If it's not a secret, does anyone know how to convert a map from WoG back to SoD? Of course, after removing all WoG-specific objects from the map. There's nothing from WoG on the map, but the editor was from WoG, so it won't open in SoD, no matter what I do... :)
Try converting the map using Map Tools. If it still doesn't open in SoD, try replacing all the "grassy hills" objects with various standard obstacles... Trees, mountains, rivers, and lakes...
Grassy hills look harmless (they're actually tricky :D :D :D). And try to see if there's such a hill in SoD or not...