Well...as far a ppl know...I am one of the reason why the Nobel scanner (new one) is encrypted (if you don't go read about me)
If you want to open it there is one solution : Send e-mail to EXOCAD, ask them to find a solution, they did UNLOCK the 3shape scanner to be compatible with exocad and my little finger tell me that Tillman the owner of Exocad know how to "hack" the Nobel Scanner to unlock it and get STL files.
Now concerning legal stuff, go read about locked cell phone you will understand that it YOUR scanner, not their, once you have paid it what you do with it, it your own business same with your locked cellphone if you unlock your, let's says AT&T phone, because you want to switch carrier they can't do anything against you.