All questions regarding mapmaking for Heroes of Might and Magic 3: The Shadow of Death.

I have the following problem. I was creating a map for SoD. But somehow, I accidentally launched it in the WoG editor and saved it. Now, the SoD editor won't open it (it says the version is more advanced), and the game itself simply doesn't recognize the map. Everything works fine in WoG, but I want to be able to launch it from SoD. Is there a solution to this problem? The map doesn't use any objects or features specific to WoG.