HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

I've encountered a serious problem: the HD mod 3.98f doesn't work for me in GameRanger; I have to play via Hamachi. If I'm the host, the opponent can't connect to me; if the opponent is the host, I can't connect to them – the cursor just spins endlessly. Before this, regular Heroes always launched without problems. It started after switching to HD mod 3.98f after the tournament. I followed the instructions from _NEO_ on the Bulgarian website; maybe someone has seen it. I have the same antivirus, NOD32. I did everything as described in the instructions, but it still doesn't work (it involves excluding GameRanger in the antivirus program's options). The firewall is also disabled on both my computer and my opponent's, and I've also disabled NOD32 itself. It still doesn't work. What could be the problem?