Quick question about reinstalling SONAR (Steam)

Hi, I'm reinstalling SONAR (Steam) cleanly just so I can remove LANDR/Melodyne 4 demo. Once it was done reinstalling, it brings up the activation window again for me to submit an email address although I have already activated the program before and made an account. Do I just put in the same email address again? Sorry if it's an odd question, just not sure if it's supposed to do that as I had registered already before.
 
Also if anyone might know using the Steam Edition, when I launch SONAR it briefly says "1/2 first time setup" but starts normally then. Is this meant to happen? Thanks.