So I found a couple of maps i want to play, but they wind up with a red dot on the left side of the tab for the custom map.  It says I have to re-export the map.  But I for the life of me, can't figure out how to do that.  I open up the Map Manager but there is no way to bring the map in question, into the map editor to export it.  Even if could manage to open a map in it, I wouldn't know how to export it into the game so that it's active.

Any advice on this?  Thanx