I don't know where to begin with this... I started with Kerbal Space Program in 0.23.5(call me newbie if you want). When I heard of version 0.24, I didn't know how to update it, so I looked it up in the wiki page, found the patcher and downloaded it there. I executed it, and all was fine. Shortly after that, when 0.25 came out, it first seemed to work well. But I opened KSP, and suddently my saved games were all messed up, and most of the parts were duplicated. It didn't get better with 0.90; even the models and textures were all over the place(I had to reinstall KSP both times). When I recently saw what great stuff will be added in the next version(new aerodynamics system, you should really check it out), I decided to ask the nice guys at the forum what I did wrong, so I can keep my old save games for the next updates. Thanks!