Background On first launch, the desktop app asks the user for an email address, sends a confirmation email, and completes registration once the user clicks the link in that email. There was a trap here for anyone who closed the app before clicking the link. Email does not always arrive immediately. Closing the app with the intention of clicking the link once the email shows up, then reopening later, is a perfectly natural way to use it. But on restart the app decided that registration was...