Hihi, I'm wondering how horrific it would be if I removed the TreeLoader folder from Gamedata? I've run some tests and without it I get a popup on first login to a new game saying that items were added to the techtree and to restart KSP. I've also unlocked the tree to the nuclear node and Interstellar items are there. The problem with mumech is that for some reason, with it installed I have to leave the tech tree for new nodes to show up ( Running 64bit KSP on linux ).