Trial Expiration requires new installation

My Cubase Pro 8.5 trial version expired, so I proceeded to buy the new licence (no upgrade but full new license since since I am a first time user)
When I type in my new license number, in elisencer I get error saying that I do not have cubase pro.
The question is, do I have to uninstall the trial version and download (and configure again) then, configure all over again everyhting???

I really hope not.