i have not ever seen a piece of equipment that has setting and updates that you cant backup your user/device settings to a file, so you can reinstall all the configurations from a single file backup.
at least when i reverted the firmware the settings didnt get deleted from them. well actually i did a hard reset on one of the controllers and it lost all the settings, but when reconnected to the app the time/settings came back to the controller.
i do this for a living, getting home from work to work on someone elses equipment is really half assed on their end.