Okay, I am stumped.
I have one install, my MTO, that will not allow me to add DEM mesh, or any other scenery for that matter. When I hit the Add button, CTD everytime.
I can do everything EXCEPT Add. Now, I have uninstalled, reinstalled CFS2, leaving all of the missions and aircraft in place. Still cannot add scenery with the Add button. Still CTD.
Any ideas how to fix this without completely removing and starting from scratch?