trenton b

HI i just went to update ksp from 1.1.1to1.1.1.1250 when it was over i discovered that a whole game save was gone for no reason. (I had no mods installed) Also for some reason i coulnt load many planes because the file for small landing gear was gone. I dont know what to do to prevent it. all I can think of to fix that is to redownload the game. But i dont know how to transfer all of my other game saves to the new version. thank you very much. -Trenton