Try to exit the editing field (by pressing the tab key) before clicking the "backup" button.
Susan&Win wrote
Regarding the problem were the Album Title does not translate correctly from CDGBackup top line to the burned folder in Finder, but instead shows "Unknown" with a number string: that is completely random, not related to brand. We've fixed them individually in Finder.
Mixage Software
www.mixagesoftware.com
support@mixagesoftware.com