Because they're not installed per se. It reads the files every time, and it can't find them if they're not named specifically. What's installed is KSP.app or .exe
i've already alternated between stock KMP and my personal list of mods twice without issue on the same copy of the game in the same folder hierarchy
i've already alternated between stock KMP and my personal list of mods twice without issue on the same copy of the game in the same folder hierarchy