Some things gone weird in my career mode with Mechjeb. I had the first tier of Mechjeb components unlocked, translatron, Delta-V stats, all that good stuff. Today, when I moved up a tier in science from getting a ship back, I unlocked the next level of Mechjeb additions, node planners, etc, but have now lost access to the previous tier of Mechjeb components. Does anyone know how to fix this? I assumed when you unlocked new science with Mechjeb features in it it was a purely additive process, as in you got the new stuff in addition to what you already had, its certainly the way I remember it working about six months ago. Any ideas?