Converting maps from WOG to SOD.

Hello!!! I have a question about Heroes of Might and Magic III: The Shadow of Death. I want to change the map version from WoG to any other, but I can’t seem to check the box to do so. I’ve downloaded other editors, but it’s the same problem. I have Windows 7, 64-bit, and not all editors work. Can you tell me how to change it so I can play without WoG? I was able to play this map normally on SoD (although it had a WoG artifact market, I removed it, but it still didn’t help), and I decided to add a town portal. I added it to my hero, saved it, and now it doesn’t recognize it, and I can’t change the version. Please help.