True. And when Win 10 uploaed a new version for me last week all my Win 7 games disappeared and when I searched I found they had a second extension, mui. Couldn't figure out how to easily get around it to make them load so was about to load new Win 10 games when one of the online suggestions was to check a folder called OldWindows.
Games were there and I copied the games folder to the current games folder and it showed the correct files without the mui extension. Great I thought, it would work. Nope, still missing a dll file. Went back to OldWindows and copied it to same location in the current OS. Now all the games work with even the previously saved scores and I have saved them to the start menu screen.
Been there... Whole thing is why did they do that without your permission or without explaining what they did and how to repair it? MS decided for you that you didn’t need those anymore, and should submit to their proprietary cloud and apps. Arrogance and disrespect against the user is an understatement. More than the OS issues I hate THAT arrogance and disrespect even more. :)