Cubase 9 Elements Issue

Hey everyone!
I bought Cubase 9 educational version. I have registered the activation code with my USB eliscencer
But every time I pull up the program Cubase 9 it says ‘no registered licence’ and if I try and active it it says the licence is already activated.
Do I need to re install Cubase since I used the 30 day free month trial licence first and that’s why it wont accept my new USB licence? Or should I have installed the activation code as a soft elisncer first before putting it on my USB and that’s why it wont work?

Does anyone know how I can fix this? I can’t find anything online.