The easiest way to check the correct address of your administrator account, is to click the Forum Creator link at the bottom of your forum's home page. That will take you to a page where you can send an email to the creator's registered email address (presumably yours!)
You'll need to login in with your test user account to send that email. If you never bothered to create a test user, then re-register on your forum with an address that you know you would not have used for your Administrator account.
A test user account is always useful to have for checking exactly what your ordinary users see on your forum and that the user permissions you set are working as intended, particularly the menu options they see.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.