Is there a way to update all my old ISBN 10's in the database to ISBN 13's? I know it will do it automatically when you first search for a book, but how about the ones that have been in the list for years? Is the only way to go back and re-enter them, or am I missing something?

There is a utility Fredrik created, located in the Add-Ons page. Convert ISBN 10 to 13.

Back up your database before using, just in case..

Thanks, don't know how I missed that one.