Correct Pec Reader, offset is 4 bytes earlier, and that is a jump command that should be loaded.

pyembroidery/PecReader.py

@@ -31,8 +31,8 @@ def read_pec(f, out, pes_chart=None):
     stitch_block_end = read_int_24le(f) - 5 + f.tell()
     # The end of this value is already 5 into the stitchblock.
 
-    # 3 bytes, '\x31\xff\xf0', 6 2-byte shorts. 15 total.
-    f.seek(0x0F, 1)
+    # 3 bytes, '\x31\xff\xf0', 4 2-byte shorts. 11 total.
+    f.seek(0x0B, 1)
     read_pec_stitches(f, out)
     f.seek(stitch_block_end, 0)