Hi @steve.davies.iphone,
It looks like it may be best to do an uninstall and reinstall, then.
Take a look at these instructions: How do I uninstall odrive? for uninstall. This will do some of the same things as de-auth, including creating a backup of your odrive folder. Then install the latest version from here: https://docs.odrive.com/docs/odrive-usage-guide#section--install-desktop-sync-