NIS Included w/computer but cant switch from 30day trial

NIS Included w/computer but cant switch from 30day trial.

NIS came with my computer, when I used it for the first time the options were enter product key or 30 trial and that if you didn't know your product key you could get it by registering. The instructions were pretty vague, so I just selected 30 trial and then went to register to retrieve the product key. Well as I soon found out, no the product key can be found under "Support". Anyhow I finally found the key but now can't find the way to update from the 30-day thing to a paid service.

 

I'm assuming it's a little trick to get users so frustrated that they just double pay for the service.