Well, it still crashes
I entered the serial number in the serial number field (duh) and the authorization code in the registration field. So far nobody has explained to me what the "Registration" field refers to, so I assumed that is where the authorization code goes, since there is no field labeled "Authorization Code" like the readme file refers to.
Even though it's been fun checking it out with 6-note polyphony, the frustration of the authorization process is driving me nuts. They don't appear to have even tested the authorization dialog, or the person who wrote the instructions hasn't even seen the ST authorization dialog. That "registration" field, and no "authorization code" field really pisses me off.
It's not THAT difficult to make your instructions match what the user sees on screen!
Sorry for ranting, but...