And and remove post_load handler in register and unregister

addons/bitsquid/__init__.py

@@ -196,24 +196,6 @@ classes = [
     MATERIAL_OT_bitsquid_export,
 ]
 
-
-def register():
-    from bpy.utils import register_class
-    for cls in classes:
-        register_class(cls)
-
-    bpy.types.Scene.bitsquid = PointerProperty(type=BitsquidSettings)
-    bpy.types.Object.bitsquid = PointerProperty(type=BitsquidObjectSettings)
-    bpy.types.Material.bitsquid = PointerProperty(type=BitsquidMaterialSettings)
-
-
-def unregister():
-    del bpy.types.Scene.bitsquid
-
-    from bpy.utils import unregister_class
-    for cls in reversed(classes):
-        unregister_class(cls)
-
 def import_template():
     cwd = os.path.dirname(os.path.realpath(__file__))
     blendfile = cwd + "\\BitsquidPBR.blend"
@@ -233,7 +215,25 @@ def import_template():
 def load_handler(dummy):
     import_template()
 
-bpy.app.handlers.load_post.append(load_handler)
+def register():
+    from bpy.utils import register_class
+    for cls in classes:
+        register_class(cls)
+
+    bpy.types.Scene.bitsquid = PointerProperty(type=BitsquidSettings)
+    bpy.types.Object.bitsquid = PointerProperty(type=BitsquidObjectSettings)
+    bpy.types.Material.bitsquid = PointerProperty(type=BitsquidMaterialSettings)
+
+    bpy.app.handlers.load_post.append(load_handler)
+
+def unregister():
+    del bpy.types.Scene.bitsquid
+
+    from bpy.utils import unregister_class
+    for cls in reversed(classes):
+        unregister_class(cls)
+
+    bpy.app.handlers.load_post.remove(load_handler)
 
 if __name__ == "__main__":
     register()