It will still be known that you once had a \"illegel\" copy of xpee corpse even if you upgrade. To activate a once pirated piece of software is nutz.
Also i think your crazy for wanting activation...and wanting XPee. IMOP of course.
Or you could try to send your pirated copy of xpee corpse back to m$ and say that is what came in the box...and you want the regular version because piracy is wrong and M$ is god...they will agree and maybe comply.