Can I activate v4 using serial number from 3.5

Continuing the discussion from TSplines 4 for Rhino released:

I bought T-Splines 3.5 after 3 july 2013. I dawnloaded trial TS v4. If I try activate it with using my serial number from v 3.5, with differen produkt key (A46F1 and A46G1), It’s inform me that my serial number is not valid. Should I have new serial number? How to get it?

I’m not sure anyone here can help. Perhaps you need to contact the T-Splines crew directly.