Fix KhronosGroup#1921 - saved setting filter file type

addons/io_scene_gltf2/__init__.py

@@ -110,7 +110,7 @@ def on_export_format_changed(self, context):
 
     # Also change the filter
     sfile.params.filter_glob = '*.glb' if self.export_format == 'GLB' else '*.gltf'
-    # Force update of file list, has update the filter does not update the real file list
+    # Force update of file list, because update the filter does not update the real file list
     bpy.ops.file.refresh()
 
 
@@ -640,6 +640,10 @@ def invoke(self, context, event):
                     setattr(self, k, v)
                 self.will_save_settings = True
 
+                # Update filter if user saved settings
+                if hasattr(self, 'export_format'):
+                    self.filter_glob = '*.glb' if self.export_format == 'GLB' else '*.gltf'
+
             except (AttributeError, TypeError):
                 self.report({"ERROR"}, "Loading export settings failed. Removed corrupted settings")
                 del context.scene[self.scene_key]