This seems to be the fix that worked for me too, never mind having lost all joystick bindings and settings.
I think its abusrd, the microsoft store is terrible, souldnt the update come automatically when trying to run the flightsim? No, microsoft logic is that its better to get on google to try and find the cause of a problem that sould never have existed. Must be a better way for gaming services to update that doesnt completley wipe your game of setings…You would think thats possible -Cough- STEAM -cough-
I regret ever having bought MSFS from the wonky microsoft store, sould have just stuck to steam. Not the first time the microsoft store has had MAJOR errors and faults… oh well…