[Zubersoft]

It sounds like something is going wrong with the configuration file being updated. My advice would be to delete C:\Users\<your username>\AppData\Local\Packages\41730Zubersoft.MobileSheets_ys1c8ct2g6ypr\LocalState\default.xml, then try changing the store location again and see if that fixes the issue with it not saving correctly. Let me know if that works.

Mike