Restart ComicBase. Bring up the Title List window (Ctrl+T), go to the title (Post-Atomic) Cyborg Gerbils and remove it form the title list. Try to run the content update again and see if the same trouble happens.
Launch Sidekick and use the Save to cloud option for your database. When it finishes, please email our team at email@example.com that the database is saved to the cloud. Our programming team will take look at your database try to replicate the trouble.