Activation key not valid

The activation key I received and copied and pasted into the window
garners the response that it is not valid and to contact the vendor
key i was provided pasted:
751bcfea-a26e-4c73-bb56-151da4b2be36
any suggestions?

Hello, have you try to activate license more than once? I can see your license activated in our system. Can you please look into main menu -> Help -> License and tell what do you see there?