I figured it out... on linux the zip will unzip to a .<random-number/letter> folder which is hidden by default. I had unzipped it multiple times, because it didn't look like it had installed properly.
For some reason after installing this I have multiple copies of every part! When I remove the KAS folder (Delete it from GameData) the copies do not go away. How do I uninstall and reinstall KAS to make the duplicate parts go away?