Hello to the comunity.
1Password Is perfect, I love it! And as a programmer, I want to suggest some security measures that can be added.
1) While some users has 1Password on many devices (Mac/Windows, iPhone/iPad, Android) any of these devices can be stolen. So may the thief can take control of password. So it would be a good idea to set some "wrong-password-attempts" that when a user enter 5-10 times wrong password, evreything included the encrypted file to be deleted.
If user choose this option, the 1password will notify the user, to make backups to external devices or cloud.
2) A usb device holding a unique password, that will be used as a 2-step-verification for computers only.