Topic on Talk:Spiritfarer
I believe the saved game folder for the MS Store is %LOCALAPPDATA%\Packages\44905ThunderLotusGames.40196900AE792_hbhkcnqstm4gr\SystemAppData\wgs
When I remove this folder, minus the t folder within it, opening the game again will resync the data from the cloud, recreating this folder. There is no %USERPROFILE%\AppData\LocalLow\Thunder Lotus Games\ folder when installed via the MS Store/Game Pass.