Thank you for using Codebook and posting to the discussion forum, although I’m sorry to hear about the trouble with Codebook.app being damaged.
I’ve responded separately to your private support request. Let me know if the suggestion resolves it for you.
For anyone else viewing this topic, if you purchased Codebook for macOS through theApp Store and you’re receiving this message, please make sure you’re using the same Apple ID you initially used to purchase Codebook and log out and back into the App Store which should allow you to download Codebook again at no cost
If you purchased Codebook directly from Zetetic, please reach out to our support at support@zetetic.net and we’ll resend your license information and a link to download the latest version of Codebook