Udating the Proton version did update the path of my saves. So I had to copy the old saves to the new directory: Old directory: SteamLibrary/steamapps/compatdata/1332010/pfx/drive_c/users/steamuser/AppData/Local/Hk_project/Saved/SaveGames/Slots New directory: SteamLibrary/steamapps/compatdata/1332010/pfx/drive_c/users/steamuser/AppData/Local/Hk_project/Saved/SaveGames/${STEAM_USER_ID}/Slots