How do I enter my (upgrade) activation key when using trial?

Hi,

Earlier today I installed Parallels 4 using a trial activation key (I have (had) Parallels 3 up until now), but now I decided to purchase the upgrade so I received my upgrade activation key.

Only thing is, I can't seem to figure out how to enter the upgrade activation key? I don't use windows that much and I would rather just get it over with, than having it stop working all of a sudden (during christmas I suppose).

 

You should go to menu Help->Activate the product and in the window appeared enter your new key and hit OK

 

Thank you very much - I'm embarassed that I didn't notice that before