I'm also trying to use Vortex for Windows Store NMS, but haven't been able to add the game to the manager. I figure this means that Vortex and Windows Store NMS are incompatible because of the locked WindowsApp files. AndASM provided a utility to unlock Windows Store NMS for modding, but I've got the game installed on D:\ while the utility seems to modify the game on C:\. Vortex only detects the .exe on D:\ which results in the error above. Am I doing this wrong?