Update package.json

package.json

@@ -6,7 +6,7 @@
     "NRelectron": {
         "productName": "Node-RED Electron App",
         "editable": true,
-        "allowLoadSave": false,
+        "allowLoadSave": true,
         "showMap": false,
         "kioskMode": false,
         "addNodes": true,
@@ -68,6 +68,12 @@
                 "to": "node_modules/@node-red/nodes/examples"
             }
         ],
+        "fileAssociations": [
+            {
+                "ext": "flow",
+                "name": "Flow file"
+            }
+        ],
         "mac": {
             "category": "public.app-category.developer-tools",
             "target": "dmg"