Make sure you have a current, valid email address set in your profile and set a password so you can login without it. If you get locked out after that time, you can choose "Forgot Password" to fix it as long as a valid email is on your account.
Couldn't figure out how to leave a review, so I'll just leave this here. This plugin worked immediately without any problems whatsoever. There are no external websites to signup with or API keys to enter, just upload, activate and go.