No, my friend and i have each our licenses. It's just so, that if i make an internetgame, hidden or not, or he does, we cant access each others computers, because of each our internetproviders firewalls.
We can tell it to join the "for example" game, it just wont connect both ways. So we thought hamachi would solve this problem, connecting peer to peer - through a hamachi server.
I cant unlock my firewall, i've tried. So has my friend (built in, in routers, locked by providers)