Software update

I need help updating my software. I registered when I bought the box but did not log in and cannot remember user name or password. I created a new profile and tried to enter the serial number again but got a prompt that said that the serial number had already been entered. How can I delete the old profile when I don't remember the login information so I can re-enter my serial number under the new profile?? Thank you!
DJ EddieB
Stuttgart, Germany
DJ EddieB
Stuttgart, Germany