In short. No.
We make it really really really clear in the documentation that if you forget the user/pass, we cant get it back for you. (And neither can you).
The best you can do is delete the project.grv file in the groov directory and start from scratch.
The fact that it was in demo mode did/does not impact anything. Its the full version with nothing going on other than the 2 hour limit. Restarting the service is the right way to keep getting more time.... It will not impact on the user/pass as its baked into the project.
Sorry, but security matters.... "If its easy, its not secure".