I have KSP on steam. I do run KSP form a steam KPS copy with my mods. Like you described. Could you give any advice on how you then proceed updating the steam copy, since only the vanilla KPS get the auto update via steam directly. What would be the best solution? I went for: do a backup of the copy I play with. Then deleting the steam version, copy the copy into the steam Version and then update it via steam ksp > local files > verify integrity of local files to update my copy. How do you guys do it. If there is a better way please do tell. Thanks in advance.