@THM  ".... I simply cannot afford to lose all that data?"

But you would be able to restore all your data from the backup(s) you have, right?  You DO have a back up (one, two, three ) of all your data, correct?  Either to thumb drives, to the cloud (Carbonite is a recommended one).

The Lacerte Tool Hub has a function to back up all the 'x'data info (where 'x' is the 'i' for individual 'p' = partnership, etc) to a file, and also to a zip file.  I copy those backup files to a thumb drive daily during filing season, and every day during the offseason if I work on tax returns.  That thumb drive (which yes, is encrypted) travels with me everywhere.