The map is not working.

I apologize, but I don't think creating a new thread for my question is necessary, so I'll ask here. I have "Heroes of Might and Magic V: Tribes of the East" version 3.0 installed. I want to download a new map and found notes in the map descriptions like: "Version 3.1 only." I started looking for version 3.0 of the map... I haven't found it yet, but I discovered that some maps don't specify the version. Please tell me how to properly find, choose, and download a map that is compatible with my game.