Re-activate addon when a file is modified.
- Download https://github.com/SaitoTsutomu/WatchAddon/archive/refs/heads/master.zip
- Start Blender.
- Edit menu -> Preferences
- Select the "Add-ons" tab.
- Press the "Install ...".
- Select the downloaded ZIP file and press the button "Install Add-on".
- Check the "Object: WatchAddon".
- Show the Sidebar.
- Show the Edit tab.
- Set the fullpath of a file.
- Press the "Start".