Thank you for the suggestions - I have tried these and still have the same issue.  I am very frustrated that the software will not open my backup.  Unfortunately the other POS option (Shopify) will not show all the details like prior transactions - notes listed under customer information.  Don’t understand why we invested so much money for this software and now it is forcing us to lose all of that old information.  We have moved to a new POS system, but now we have lost years of information as a reference.  Just another major company taking advantage of the small business.