Hi there. The email was indeed from us, there is no need to worry. If you don't wish to continue using 1Password, you can contact support@1password.com and they can help you delete your account so you'll no longer be asked to complete registration.
新功能
Localization has been improved for a number of our supported languages using new translations from Crowdin. We've fixed an issue for family organizers and administrators where the Shared vault could appear twice in the list of vaults for some people in the Manage Accounts screen.