diff --git a/inkstitch.py b/inkstitch.py
index 13eab8098..4c9d2789d 100644
--- a/inkstitch.py
+++ b/inkstitch.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import logging
 import os
 import sys
diff --git a/lib/api/__init__.py b/lib/api/__init__.py
index f93e59a98..35e411a75 100644
--- a/lib/api/__init__.py
+++ b/lib/api/__init__.py
@@ -1 +1,6 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .server import APIServer
\ No newline at end of file
diff --git a/lib/api/install.py b/lib/api/install.py
index f52233fbe..242b55b43 100644
--- a/lib/api/install.py
+++ b/lib/api/install.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import sys
 from glob import glob
diff --git a/lib/api/server.py b/lib/api/server.py
index 0db253c67..66087b4ec 100644
--- a/lib/api/server.py
+++ b/lib/api/server.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import errno
 import logging
 import socket
diff --git a/lib/api/simulator.py b/lib/api/simulator.py
index d11bd3082..26c0246c3 100644
--- a/lib/api/simulator.py
+++ b/lib/api/simulator.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from flask import Blueprint
 
 simulator = Blueprint('simulator', __name__)
diff --git a/lib/api/stitch_plan.py b/lib/api/stitch_plan.py
index 95cdc7d85..2011b5929 100644
--- a/lib/api/stitch_plan.py
+++ b/lib/api/stitch_plan.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from flask import Blueprint, g, jsonify
 
 from ..stitch_plan import patches_to_stitch_plan
diff --git a/lib/commands.py b/lib/commands.py
index ba3074878..da07df0a1 100644
--- a/lib/commands.py
+++ b/lib/commands.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import sys
 from copy import deepcopy
diff --git a/lib/debug.py b/lib/debug.py
index 5d022e63a..f47d09ec8 100644
--- a/lib/debug.py
+++ b/lib/debug.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import atexit
 import os
 import socket
diff --git a/lib/elements/__init__.py b/lib/elements/__init__.py
index d53b2314c..2e4c31a7f 100644
--- a/lib/elements/__init__.py
+++ b/lib/elements/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .auto_fill import AutoFill
 from .clone import Clone
 from .element import EmbroideryElement
diff --git a/lib/elements/auto_fill.py b/lib/elements/auto_fill.py
index 31da7e630..69533f62a 100644
--- a/lib/elements/auto_fill.py
+++ b/lib/elements/auto_fill.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import math
 import sys
 import traceback
diff --git a/lib/elements/clone.py b/lib/elements/clone.py
index fd770bd7c..6dafa63de 100644
--- a/lib/elements/clone.py
+++ b/lib/elements/clone.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from math import atan, degrees
 
 import inkex
diff --git a/lib/elements/element.py b/lib/elements/element.py
index 2ced143b7..b45604d2d 100644
--- a/lib/elements/element.py
+++ b/lib/elements/element.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 from copy import deepcopy
 
diff --git a/lib/elements/empty_d_object.py b/lib/elements/empty_d_object.py
index 69a128ad7..dbb43bc42 100644
--- a/lib/elements/empty_d_object.py
+++ b/lib/elements/empty_d_object.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..i18n import _
 from .element import EmbroideryElement
 from .validation import ObjectTypeWarning
diff --git a/lib/elements/fill.py b/lib/elements/fill.py
index 1f4c7b1e7..b67991658 100644
--- a/lib/elements/fill.py
+++ b/lib/elements/fill.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import logging
 import math
 import re
diff --git a/lib/elements/image.py b/lib/elements/image.py
index 160898a5b..0828b5ef4 100644
--- a/lib/elements/image.py
+++ b/lib/elements/image.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..i18n import _
 from ..svg.path import get_node_transform
 from .element import EmbroideryElement
diff --git a/lib/elements/polyline.py b/lib/elements/polyline.py
index da1e807df..5ea005082 100644
--- a/lib/elements/polyline.py
+++ b/lib/elements/polyline.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from inkex import Path
 from shapely import geometry as shgeo
 
diff --git a/lib/elements/satin_column.py b/lib/elements/satin_column.py
index fbadd92ff..72b7ed0f6 100644
--- a/lib/elements/satin_column.py
+++ b/lib/elements/satin_column.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from copy import deepcopy
 from itertools import chain
 
diff --git a/lib/elements/stroke.py b/lib/elements/stroke.py
index d63a21a91..e3cd43906 100644
--- a/lib/elements/stroke.py
+++ b/lib/elements/stroke.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 
 import shapely.geometry
diff --git a/lib/elements/text.py b/lib/elements/text.py
index 838be96ae..dbf76c854 100644
--- a/lib/elements/text.py
+++ b/lib/elements/text.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..i18n import _
 from .element import EmbroideryElement
 from .validation import ObjectTypeWarning
diff --git a/lib/elements/utils.py b/lib/elements/utils.py
index 378cec0c5..aceab4854 100644
--- a/lib/elements/utils.py
+++ b/lib/elements/utils.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..commands import is_command
 from ..svg.tags import (EMBROIDERABLE_TAGS, SVG_IMAGE_TAG, SVG_PATH_TAG,
                         SVG_POLYLINE_TAG, SVG_TEXT_TAG)
diff --git a/lib/elements/validation.py b/lib/elements/validation.py
index f77e2fc4c..c14b634cf 100644
--- a/lib/elements/validation.py
+++ b/lib/elements/validation.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from shapely.geometry import Point as ShapelyPoint
 
 from ..utils import Point as InkstitchPoint
diff --git a/lib/exceptions.py b/lib/exceptions.py
index c1ff36f0b..a9820ac30 100644
--- a/lib/exceptions.py
+++ b/lib/exceptions.py
@@ -1,2 +1,7 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 class InkstitchException(Exception):
     pass
diff --git a/lib/extensions/__init__.py b/lib/extensions/__init__.py
index 1758772ee..1905817a9 100644
--- a/lib/extensions/__init__.py
+++ b/lib/extensions/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from lib.extensions.troubleshoot import Troubleshoot
 
 from .auto_satin import AutoSatin
diff --git a/lib/extensions/auto_satin.py b/lib/extensions/auto_satin.py
index fce4a1fd0..62fb15af7 100644
--- a/lib/extensions/auto_satin.py
+++ b/lib/extensions/auto_satin.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 
 import inkex
diff --git a/lib/extensions/base.py b/lib/extensions/base.py
index 1a38973f7..1d83be591 100644
--- a/lib/extensions/base.py
+++ b/lib/extensions/base.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import json
 import os
 import re
diff --git a/lib/extensions/break_apart.py b/lib/extensions/break_apart.py
index d0ab2619f..c2eb02d43 100644
--- a/lib/extensions/break_apart.py
+++ b/lib/extensions/break_apart.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import logging
 from copy import copy
 
diff --git a/lib/extensions/cleanup.py b/lib/extensions/cleanup.py
index f1965abac..99b72a815 100644
--- a/lib/extensions/cleanup.py
+++ b/lib/extensions/cleanup.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from inkex import NSS, Boolean, errormsg
 
 from ..elements import Fill, Stroke
diff --git a/lib/extensions/commands.py b/lib/extensions/commands.py
index 19b85e6d3..0f1fefabd 100644
--- a/lib/extensions/commands.py
+++ b/lib/extensions/commands.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from inkex import Boolean
 
 from .base import InkstitchExtension
diff --git a/lib/extensions/convert_to_satin.py b/lib/extensions/convert_to_satin.py
index 048c08da4..393ffd9ef 100644
--- a/lib/extensions/convert_to_satin.py
+++ b/lib/extensions/convert_to_satin.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import math
 import sys
 from itertools import chain, groupby
diff --git a/lib/extensions/cut_satin.py b/lib/extensions/cut_satin.py
index 7cc802953..b471239ec 100644
--- a/lib/extensions/cut_satin.py
+++ b/lib/extensions/cut_satin.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 
 from ..elements import SatinColumn
diff --git a/lib/extensions/embroider_settings.py b/lib/extensions/embroider_settings.py
index 88e2ba9b5..f504c88f6 100644
--- a/lib/extensions/embroider_settings.py
+++ b/lib/extensions/embroider_settings.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .base import InkstitchExtension
 
 
diff --git a/lib/extensions/flip.py b/lib/extensions/flip.py
index 87b8b3f0c..743f1701b 100644
--- a/lib/extensions/flip.py
+++ b/lib/extensions/flip.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 
 from ..elements import SatinColumn
diff --git a/lib/extensions/global_commands.py b/lib/extensions/global_commands.py
index 9655c7afe..6c1f2f10b 100644
--- a/lib/extensions/global_commands.py
+++ b/lib/extensions/global_commands.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .layer_commands import LayerCommands
 from ..commands import GLOBAL_COMMANDS
 
diff --git a/lib/extensions/import_threadlist.py b/lib/extensions/import_threadlist.py
index 029043c2c..f7fe0bcc2 100644
--- a/lib/extensions/import_threadlist.py
+++ b/lib/extensions/import_threadlist.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import re
 import sys
diff --git a/lib/extensions/input.py b/lib/extensions/input.py
index c6dcb698d..137885107 100644
--- a/lib/extensions/input.py
+++ b/lib/extensions/input.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 
 import inkex
diff --git a/lib/extensions/install.py b/lib/extensions/install.py
index 9756fb835..62cfde73e 100644
--- a/lib/extensions/install.py
+++ b/lib/extensions/install.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .base import InkstitchExtension
 from ..api import APIServer
 from ..gui import open_url
diff --git a/lib/extensions/layer_commands.py b/lib/extensions/layer_commands.py
index 89726510e..2494e8204 100644
--- a/lib/extensions/layer_commands.py
+++ b/lib/extensions/layer_commands.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 from lxml import etree
 
diff --git a/lib/extensions/lettering.py b/lib/extensions/lettering.py
index ee0dd9a0b..8fc3168ac 100644
--- a/lib/extensions/lettering.py
+++ b/lib/extensions/lettering.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import json
 import os
 import sys
diff --git a/lib/extensions/lettering_custom_font_dir.py b/lib/extensions/lettering_custom_font_dir.py
index 0103c7d61..e2af3d472 100644
--- a/lib/extensions/lettering_custom_font_dir.py
+++ b/lib/extensions/lettering_custom_font_dir.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import json
 import os
 
diff --git a/lib/extensions/lettering_generate_json.py b/lib/extensions/lettering_generate_json.py
index 9b44c3670..fd1eab30c 100644
--- a/lib/extensions/lettering_generate_json.py
+++ b/lib/extensions/lettering_generate_json.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import json
 import os
 import sys
diff --git a/lib/extensions/lettering_remove_kerning.py b/lib/extensions/lettering_remove_kerning.py
index aec8717ed..1e30e8726 100644
--- a/lib/extensions/lettering_remove_kerning.py
+++ b/lib/extensions/lettering_remove_kerning.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 
 from inkex import NSS
diff --git a/lib/extensions/object_commands.py b/lib/extensions/object_commands.py
index f1c2fb460..851d4a347 100644
--- a/lib/extensions/object_commands.py
+++ b/lib/extensions/object_commands.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 
 from ..commands import OBJECT_COMMANDS, add_commands
diff --git a/lib/extensions/output.py b/lib/extensions/output.py
index 52e9d3a9d..e621f1b6c 100644
--- a/lib/extensions/output.py
+++ b/lib/extensions/output.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import sys
 import tempfile
diff --git a/lib/extensions/params.py b/lib/extensions/params.py
index 910941fe2..87b9c3bf9 100644
--- a/lib/extensions/params.py
+++ b/lib/extensions/params.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 # -*- coding: UTF-8 -*-
 
 import os
diff --git a/lib/extensions/print_pdf.py b/lib/extensions/print_pdf.py
index 1218b5e99..a75c781e7 100644
--- a/lib/extensions/print_pdf.py
+++ b/lib/extensions/print_pdf.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import errno
 import json
 import logging
diff --git a/lib/extensions/remove_embroidery_settings.py b/lib/extensions/remove_embroidery_settings.py
index 6ccdb7037..55c29e778 100644
--- a/lib/extensions/remove_embroidery_settings.py
+++ b/lib/extensions/remove_embroidery_settings.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from inkex import NSS, Boolean
 
 from ..commands import find_commands
diff --git a/lib/extensions/reorder.py b/lib/extensions/reorder.py
index 4db027600..8a2a1b2e4 100644
--- a/lib/extensions/reorder.py
+++ b/lib/extensions/reorder.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 
 from .base import InkstitchExtension
diff --git a/lib/extensions/simulator.py b/lib/extensions/simulator.py
index 66be752bf..c04e1acd6 100644
--- a/lib/extensions/simulator.py
+++ b/lib/extensions/simulator.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..api import APIServer
 from ..gui import open_url
 
diff --git a/lib/extensions/stitch_plan_preview.py b/lib/extensions/stitch_plan_preview.py
index e1c398b58..40ad6a2a1 100644
--- a/lib/extensions/stitch_plan_preview.py
+++ b/lib/extensions/stitch_plan_preview.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..stitch_plan import patches_to_stitch_plan
 from ..svg import render_stitch_plan
 from .base import InkstitchExtension
diff --git a/lib/extensions/troubleshoot.py b/lib/extensions/troubleshoot.py
index bd352d8fd..113a93839 100644
--- a/lib/extensions/troubleshoot.py
+++ b/lib/extensions/troubleshoot.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import textwrap
 
 from inkex import errormsg
diff --git a/lib/extensions/zip.py b/lib/extensions/zip.py
index fedf8c655..d0c56ba22 100644
--- a/lib/extensions/zip.py
+++ b/lib/extensions/zip.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import sys
 import tempfile
diff --git a/lib/gui/__init__.py b/lib/gui/__init__.py
index 8869fb6dd..1509fa775 100644
--- a/lib/gui/__init__.py
+++ b/lib/gui/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .dialogs import confirm_dialog, info_dialog
 from .electron import open_url
 from .presets import PresetsPanel
diff --git a/lib/gui/dialogs.py b/lib/gui/dialogs.py
index c09503b3f..e270d2e57 100644
--- a/lib/gui/dialogs.py
+++ b/lib/gui/dialogs.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import wx
 
 
diff --git a/lib/gui/electron.py b/lib/gui/electron.py
index ef215fb53..dcf03c6f3 100644
--- a/lib/gui/electron.py
+++ b/lib/gui/electron.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import subprocess
 import sys
diff --git a/lib/gui/presets.py b/lib/gui/presets.py
index 2c0d04816..7fbce4961 100644
--- a/lib/gui/presets.py
+++ b/lib/gui/presets.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import json
 import os
 import re
diff --git a/lib/gui/simulator.py b/lib/gui/simulator.py
index 996bc8f96..c41008044 100644
--- a/lib/gui/simulator.py
+++ b/lib/gui/simulator.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 import time
 import traceback
diff --git a/lib/i18n.py b/lib/i18n.py
index 50e71c921..37972e366 100644
--- a/lib/i18n.py
+++ b/lib/i18n.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import gettext
 import os
 import sys
diff --git a/lib/inx/__init__.py b/lib/inx/__init__.py
index cc2b039d6..6d4846f2f 100644
--- a/lib/inx/__init__.py
+++ b/lib/inx/__init__.py
@@ -1 +1,6 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .generate import generate_inx_files
diff --git a/lib/inx/about.py b/lib/inx/about.py
index 6db13865a..c1ce458f3 100755
--- a/lib/inx/about.py
+++ b/lib/inx/about.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .utils import build_environment, write_inx_file
 
 
diff --git a/lib/inx/extensions.py b/lib/inx/extensions.py
index 379e98cd5..9a197c5df 100755
--- a/lib/inx/extensions.py
+++ b/lib/inx/extensions.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import pyembroidery
 
 from ..commands import (COMMANDS, GLOBAL_COMMANDS, LAYER_COMMANDS,
diff --git a/lib/inx/generate.py b/lib/inx/generate.py
index 8a5b95696..cfcb224e1 100644
--- a/lib/inx/generate.py
+++ b/lib/inx/generate.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .info import generate_info_inx_files
 from .extensions import generate_extension_inx_files
 from .inputs import generate_input_inx_files
diff --git a/lib/inx/info.py b/lib/inx/info.py
index f391b546f..3a69adad4 100755
--- a/lib/inx/info.py
+++ b/lib/inx/info.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .utils import build_environment, write_inx_file
 
 
diff --git a/lib/inx/inputs.py b/lib/inx/inputs.py
index b50ec9f9d..2cf84df9f 100755
--- a/lib/inx/inputs.py
+++ b/lib/inx/inputs.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import pyembroidery
 
 from .utils import build_environment, write_inx_file
diff --git a/lib/inx/outputs.py b/lib/inx/outputs.py
index ccb323c70..1ac1daf88 100644
--- a/lib/inx/outputs.py
+++ b/lib/inx/outputs.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import pyembroidery
 
 from .utils import build_environment, write_inx_file
diff --git a/lib/inx/utils.py b/lib/inx/utils.py
index 2fb6b21b4..4a62c5077 100644
--- a/lib/inx/utils.py
+++ b/lib/inx/utils.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import errno
 import gettext
 import os
diff --git a/lib/lettering/__init__.py b/lib/lettering/__init__.py
index 5a9d345c5..a733aa9f6 100644
--- a/lib/lettering/__init__.py
+++ b/lib/lettering/__init__.py
@@ -1 +1,6 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .font import Font, FontError
diff --git a/lib/lettering/font.py b/lib/lettering/font.py
index 3ef99d47e..7b479072d 100644
--- a/lib/lettering/font.py
+++ b/lib/lettering/font.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import json
 import os
 from copy import deepcopy
diff --git a/lib/lettering/font_variant.py b/lib/lettering/font_variant.py
index 2071b2cb0..b1e383682 100644
--- a/lib/lettering/font_variant.py
+++ b/lib/lettering/font_variant.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 
 import inkex
diff --git a/lib/lettering/glyph.py b/lib/lettering/glyph.py
index 84517474e..3bedd7edc 100644
--- a/lib/lettering/glyph.py
+++ b/lib/lettering/glyph.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from copy import copy
 
 from inkex import paths, transforms
diff --git a/lib/lettering/kerning.py b/lib/lettering/kerning.py
index 920e7d59f..6db9ba1e7 100644
--- a/lib/lettering/kerning.py
+++ b/lib/lettering/kerning.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from inkex import NSS
 from lxml import etree
 
diff --git a/lib/output.py b/lib/output.py
index 60579801b..e330354d4 100644
--- a/lib/output.py
+++ b/lib/output.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 import inkex
 
diff --git a/lib/stitch_plan/__init__.py b/lib/stitch_plan/__init__.py
index 2aaa0ab97..68301e94e 100644
--- a/lib/stitch_plan/__init__.py
+++ b/lib/stitch_plan/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .stitch_plan import patches_to_stitch_plan, StitchPlan, ColorBlock
 from .stitch import Stitch
 from .read_file import stitch_plan_from_file
diff --git a/lib/stitch_plan/read_file.py b/lib/stitch_plan/read_file.py
index ff5a68aca..56567f368 100644
--- a/lib/stitch_plan/read_file.py
+++ b/lib/stitch_plan/read_file.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import pyembroidery
 from .stitch_plan import StitchPlan
 
diff --git a/lib/stitch_plan/stitch.py b/lib/stitch_plan/stitch.py
index ccbea12e3..a5938c7b9 100644
--- a/lib/stitch_plan/stitch.py
+++ b/lib/stitch_plan/stitch.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..utils.geometry import Point
 
 
diff --git a/lib/stitch_plan/stitch_plan.py b/lib/stitch_plan/stitch_plan.py
index de66cb10a..47e8b2036 100644
--- a/lib/stitch_plan/stitch_plan.py
+++ b/lib/stitch_plan/stitch_plan.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from ..svg import PIXELS_PER_MM
 from ..threads import ThreadColor
 from ..utils.geometry import Point
diff --git a/lib/stitch_plan/ties.py b/lib/stitch_plan/ties.py
index 5acf16e66..d54b0f0ff 100644
--- a/lib/stitch_plan/ties.py
+++ b/lib/stitch_plan/ties.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from copy import deepcopy
 
 from .stitch import Stitch
diff --git a/lib/stitches/__init__.py b/lib/stitches/__init__.py
index 12c636a63..4de88733e 100644
--- a/lib/stitches/__init__.py
+++ b/lib/stitches/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .auto_fill import auto_fill
 from .fill import legacy_fill
 from .running_stitch import *
diff --git a/lib/stitches/auto_fill.py b/lib/stitches/auto_fill.py
index 485f51e58..07361f138 100644
--- a/lib/stitches/auto_fill.py
+++ b/lib/stitches/auto_fill.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 # -*- coding: UTF-8 -*-
 
 import math
diff --git a/lib/stitches/auto_satin.py b/lib/stitches/auto_satin.py
index 5ce91a495..795df036c 100644
--- a/lib/stitches/auto_satin.py
+++ b/lib/stitches/auto_satin.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import math
 from itertools import chain
 
diff --git a/lib/stitches/fill.py b/lib/stitches/fill.py
index a19e080bb..5aead9c75 100644
--- a/lib/stitches/fill.py
+++ b/lib/stitches/fill.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import math
 
 import shapely
diff --git a/lib/stitches/running_stitch.py b/lib/stitches/running_stitch.py
index 57a038658..2878480c6 100644
--- a/lib/stitches/running_stitch.py
+++ b/lib/stitches/running_stitch.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from copy import copy
 
 """ Utility functions to produce running stitches. """
diff --git a/lib/svg/__init__.py b/lib/svg/__init__.py
index 640aee737..b17a37f0c 100644
--- a/lib/svg/__init__.py
+++ b/lib/svg/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .guides import get_guides
 from .path import apply_transforms, get_node_transform, get_correction_transform, line_strings_to_csp, point_lists_to_csp, line_strings_to_path
 from .path import apply_transforms, get_node_transform, get_correction_transform, line_strings_to_csp, point_lists_to_csp
diff --git a/lib/svg/guides.py b/lib/svg/guides.py
index 255b3e6a9..e492a90dc 100644
--- a/lib/svg/guides.py
+++ b/lib/svg/guides.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from inkex import transforms
 
 from ..utils import Point, cache, string_to_floats
diff --git a/lib/svg/path.py b/lib/svg/path.py
index baa93443e..b503cc759 100644
--- a/lib/svg/path.py
+++ b/lib/svg/path.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 from lxml import etree
 
diff --git a/lib/svg/rendering.py b/lib/svg/rendering.py
index ced7d4f16..c28c70035 100644
--- a/lib/svg/rendering.py
+++ b/lib/svg/rendering.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import math
 
 import inkex
diff --git a/lib/svg/svg.py b/lib/svg/svg.py
index 1a6b10e8c..3bd9a693a 100644
--- a/lib/svg/svg.py
+++ b/lib/svg/svg.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from inkex import NSS
 from lxml import etree
 
diff --git a/lib/svg/tags.py b/lib/svg/tags.py
index 6fa47aa0d..5c1d892a3 100644
--- a/lib/svg/tags.py
+++ b/lib/svg/tags.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 from lxml import etree
 
diff --git a/lib/svg/units.py b/lib/svg/units.py
index 6f16d7fbc..f229c2c3a 100644
--- a/lib/svg/units.py
+++ b/lib/svg/units.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import inkex
 
 from ..i18n import _
diff --git a/lib/threads/__init__.py b/lib/threads/__init__.py
index 1081ea140..18ef3e0d6 100644
--- a/lib/threads/__init__.py
+++ b/lib/threads/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .catalog import ThreadCatalog
 from .color import ThreadColor
 from .palette import ThreadPalette
diff --git a/lib/threads/catalog.py b/lib/threads/catalog.py
index c91ce2276..c3ccb0c3c 100644
--- a/lib/threads/catalog.py
+++ b/lib/threads/catalog.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import sys
 from collections.abc import Sequence
diff --git a/lib/threads/color.py b/lib/threads/color.py
index 320161128..69a707980 100644
--- a/lib/threads/color.py
+++ b/lib/threads/color.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import colorsys
 import re
 
diff --git a/lib/threads/palette.py b/lib/threads/palette.py
index c5e3002c1..f1ff6cb4e 100644
--- a/lib/threads/palette.py
+++ b/lib/threads/palette.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from collections.abc import Set
 
 from colormath.color_conversions import convert_color
diff --git a/lib/utils/__init__.py b/lib/utils/__init__.py
index 2b39da71b..b24257be9 100644
--- a/lib/utils/__init__.py
+++ b/lib/utils/__init__.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from .cache import cache
 from .dotdict import DotDict
 from .geometry import *
diff --git a/lib/utils/cache.py b/lib/utils/cache.py
index 3a2636f22..c0313ebe5 100644
--- a/lib/utils/cache.py
+++ b/lib/utils/cache.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 try:
     from functools import lru_cache
 except ImportError:
diff --git a/lib/utils/dotdict.py b/lib/utils/dotdict.py
index e946ecd44..acd575b90 100644
--- a/lib/utils/dotdict.py
+++ b/lib/utils/dotdict.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 class DotDict(dict):
     """A dict subclass that allows accessing methods using dot notation.
 
diff --git a/lib/utils/geometry.py b/lib/utils/geometry.py
index f7b49407e..1e0c6ad03 100644
--- a/lib/utils/geometry.py
+++ b/lib/utils/geometry.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import math
 
 from shapely.geometry import LineString
diff --git a/lib/utils/inkscape.py b/lib/utils/inkscape.py
index f89ea447f..624426503 100644
--- a/lib/utils/inkscape.py
+++ b/lib/utils/inkscape.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 from os.path import expanduser, realpath
 
diff --git a/lib/utils/io.py b/lib/utils/io.py
index 239585f43..26ee72a54 100644
--- a/lib/utils/io.py
+++ b/lib/utils/io.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import os
 import sys
 from io import StringIO
diff --git a/lib/utils/json.py b/lib/utils/json.py
index c670a46b2..63b3cfb50 100644
--- a/lib/utils/json.py
+++ b/lib/utils/json.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 from flask.json import JSONEncoder
 
 
diff --git a/lib/utils/paths.py b/lib/utils/paths.py
index 6dbaf13d2..938c5f332 100644
--- a/lib/utils/paths.py
+++ b/lib/utils/paths.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 import os
 from os.path import dirname, realpath
diff --git a/lib/utils/string.py b/lib/utils/string.py
index a7839f7d3..cb852ce3d 100644
--- a/lib/utils/string.py
+++ b/lib/utils/string.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 def string_to_floats(string, delimiter=","):
     """Convert a string of delimiter-separated floats into a list of floats."""
 
diff --git a/lib/utils/version.py b/lib/utils/version.py
index 02eb388bc..57ef11f03 100644
--- a/lib/utils/version.py
+++ b/lib/utils/version.py
@@ -1,3 +1,8 @@
+# Authors: see git history
+#
+# Copyright (c) 2010 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
 import sys
 from os.path import isfile, join, realpath