Accessing Marco Minnemann

I’ve installed Marco Minnemann Studio drums add on to Groove Agent. But when I go to use it, it comes up with 'no license found". I’ve checked the activation manager, and it shows it’s been installed. What else do I need to do?

Activate it. Installed is not the same as activated

Sorry, being a newbie with Cubase, I’m slow with this …how do I “activate” it?