I’ve run several attempts at installing the ATR from the Marketplace with no luck.
So far I have tried to delete any microsoft-aircraft-atr related folders from the Official folder, but no luck. There are claims from Asobo/MSFS devs that this issue had been resolved in the past but I can definitely confirm it still is an issue with the latest version of MSFS.
Also for some (I guess related) reason MSFS just doesn’t want to exit to desktop in an orderly fashion anymore.
See the screenshot below:
