Everything seemed to be fine, I launched the game, opened "Data Files" and turned them on.
Game launched and everything worked fine. I played for a few minutes just setting up a character, etc and then quit out to look at a few other mods.
Now, whenever I open the launcher and try to open "Data Files" the game crashes. If I just launch Morrowind everything is fine and my active mods are loaded, but I cannot access the "Data Files" menu to enable/disable mods. Anyone know why this is happening?