Did you pay for it already and he's refusing to give you what you paid for? Tell him to give you your money back or the program, if he refuses take him to court.
I bought a program online and the owner doesn't like me, He won't deactivate my license so I can transfer it to a new computer. Help me please! I email him and he said "No, not for you"?
Well, however you paid him, just stop payment. If you paid by credit card, then call your company and dispute the charge and get a refund. Doesn't matter if he likes you or not. Dispute the payment! Easy enough to do ! Even if some time has passed. Card companies will work with you.