I think @Flupster had a more recent version, so I used https://github.com/Flupster/KSP-X-Science. I copied the"GameData/[x] Science!" directory from there, and put the compiled DLL into it. I also modified the .version file to give it a new version number, then copied the same [x] Science! folder to my KSP install's GameData folder. Good luck!