QB 2007, released in late 2006, changed the data base from flat tables to a Relational database. QB 2013 was another significant year for Reprogramming.
Intuit has a 3-year lifecycle. You would need to go, at a minimum:
2006-2009-2013-2016-2019 And Rebuild the file in between.
Or, you give the file to Intuit to Update for you.
And the Backup, or .qbb file, is something you would be making after every work session and keeping on a USB or in the Cloud, a Safe place, so that if the computer dies of the program crashes, you still have the Backup file to use for disaster recovery. Set the program to "rotate" = keep only 3 or 5 and when you make the Next Backup, it offers to delete that Oldest for you.
