I've been using 1Password on my Mac, iPad and iPhone for awhile now, no problems. On my Mac, I believe something got corrupted. I'm getting a complaint that the "1Password.app" is damaged and can't be opened. Delete "1Password.app" and download it again from the App Store. The icon for this dialogue is a the AppStore icon, not 1Password. I've deleted it and downloaded it again a couple of times — same error.
Any suggestions as to what to do next, besides "downloading it again", again?