BTN = BUTTON | DISBTN = DISABLED BUTTON.
The BTN you have are commands you can give to your units etc but if you have a DISBTN that button is obviously disabled, when importing a BTN to your map make sure you also import yhe DISBTN otherwise when you pause the game or cant use that ability, the DISBTN shows up as a big ugly green square thats really notticible.
import them both, 2x click the path and get rid of the warIIImapImported and just put ReplaceableTextures\(command buttons name) and there. when ur using the hero with the new icon, he'll have the new icon that you put in normal mode and in DISBTN when it disabled or you pause the game.