A THREAD FOR NEWCOMERS!

People, I can't download many maps; it says: incorrect map file version. File version = 51, current version = 28. What is this?

There aren't many options here! Most likely, you are trying to open a map for Heroes of Might and Magic Online (Heroes of Might and Magic Online) with the map editor for The Shadow of Death!
What map is it, and what version of the game do you have?