[Zubersoft]

Everything you did is absolutely correct. If you completely closed MobileSheets, copied over the database file, then restarted the app and it gave you that error message, it means MobileSheets is unable to access the database file for some reason. This usually comes down to corruption of some kind. You can try copying the file again as perhaps something got messed up when the file was copied, or if there truly is corruption in the database, send it to mike@zubersoft.com, I'll try to repair the database using sqlite and I'll send it back to you. I can also use sqlite to run a "pragma integrity_check" on it to see if it detects any problems before doing anything else. If you are comfortably running sqlite, you can run that check on the file yourself as well. 

Mike