Hmm... I don't think that's the issue I'm suffering with. I rename all the ZIP folders so I know what's in them: If the folder name is causing an issue for KSP, I'd think it would be Bobcat 3m Base systems or Bolt-on Probes or something, because they have non-alphanumeric characters. But Mech Jeb is all letters and a single space and that's 100% broken. On another note, is there anywhere we can download previous versions of the KSPMM? Because of the issues I'm having, I'm reverting back to .19 for now, so I can continue to play with my saves and mods and starting a new install for .20... but you said we can't use this version of KSPMM for .19 anymore.