I'm having the same issue. No warping, no node execution, and it will actively prevent me from adjusting throttle on my own (but it will adjust the heading properly). Edit: I removed and reinstalled Mechjeb (everything done via CKAN) which had no effect. Third time shutting down and rebooting the program seems to have resolved it though, so yay! Not sure how I got that to happen in the first place; Mechjeb is very reliable as mods go. I had just installed a few mods which caused KSP to crash on boot, then removed them, so I'm guessing something changed some shared files? Anyway, thank you for running this mod. Takes the pain out of a million repetitive, simple burns and hour-long burns, plus the instrumentation is invaluable. It really makes certain strategies playable.