Hey man, I was wondering the same thing having 1000 cd's myself w/album art for all. I risked it anyways. If you attempt to install over the old program, a prompt will pop up saying it detected an older version and suggests you uninstall the older version before installing the new.

So...I uninstalled the May 3rd version in favor of the July 25th version. It doesn't delete your cd database, when you start up the new version it prompts for the database location....just click on your current database and you are back in business no harm no foul. FYI ;D