In any case, I found a workaround. You have to add yourself to the security tab of the c:\program files\modifiablewindowsapps\ and give yourself Full Control. Once you do that, you can pick that folder as your default install folder in the xbox app. This will move your games to that folder again. I verified my install of conan exiles from the xbox app after this and then added the mods folder again with all the mods. After I did that I was able to run the game as administrator and the mods menu option was available from the in game menu.