Chuck23y

I downloaded this mode( mode 0.12.0 to ksp 0.23.5.) today and I am really confused. I want to write some programs on my desk ( in txt files of course ) and use them in the game but don't know where to save them. Everywhere it says, save them on the archive folder, but unfortunatelly I cannot find it. If anyone has an idea, or know where or what is archive folder, or how I can use program written in txt, pls HELP!