Thanks for the quick response! I tried changing the default directory and it now starts in my KSP folder, but it still won't work. I just get the initial screen. Could it be because the Linux version of KSP doesn't use KSP.app or KSP.exe (your help file indicates that it needs to see one of these)? The Linux version seems to have KSP.x86 and KSP.x86_64. It seems to be looking in the right place, but not seeing whatever it needs. I'm happy to help out with Linux testing, but fair warning, I'm a total Linux noob (as you may or may not be able to tell).