From what I can see on the subscription page to gain the full version they send a product key via USB in the mail.

Is this correct? I would have assumed it would be an activation key through email, but at the purchase page they ask to select a physical shipping method.

I'm working on a tight deadline so if I can't get access immediately it would be useless to order.

Can anyone clarify?

Also if you read the warnings, anything drawn with the demo program is useless to the full version. 

Sorry to tell you that.