E-Licenser HELP!

I have just purchased the upgrade to Dorico 3.5, and as usual I am totally confused with the licensing system. I have an activation code and want to have the soft e-licenser on my iMac rather than a dongle. Can somebody please enlighten me please as to what I need to do? The problem that I have run into is on the attached screenshot. Steinberg must have just about the most confusing licensing system out there!. Many thanks. Nick

I have got this sorted now with the help of a good friend!