I thought that originally as well, that's why I made a copy of the original minor race's tech tree and tried to use that, but the game still crashes when that's used as well, however, the original minor races tech tree still works though. I thought maybe something may have gotten corrupted along the way with some of the files, but i've reset all the files to defaults, and cleared the cache, but it still is having problems for some reason. Any other suggestions would be appreciated.