Procoder 2 Divx Help!

OK … I have Procoder 2 and it came with Divx 5. something (need to buy)… It installs with this Divx 5 and keeps asking me for a registration number … The thing is I have Divx Pro 6 that I own … How do I make Procoder use my Divx Pro 6 instead of this 5 that came with it ??? Any ideas ???