What is a Batch File?

[Rhyfelwyr]

I've created the Batch file, but my changes still aren't appearing in game. I changed the stats of Mailed Knights in export_descr_unit, and when I look at the file, its the way I left it, with the edited stats. It's just not appearing in-game.

EDIT: Never mind I was trying to run it through the M2TW shortcut.