I purchased the software, loaded it, and activated it with no difficulty.
I then proceeded to my lakeside cottage where there's no Internet connectivity. When I started the application again I was asked for my Activation Key - of course with no Internet connection I was stuck.
Subsequently I reconnected to the Internet and re-entered the Activation key (I only have the one key, never used the free trial or personal edition).
Now the request for activation has occurred again, when I'm off-line.
Is this normal behavior and, if so, why? BTW - enjoying the SW very much, otherwise.