Just to make sure you're doing everything right, you download the file, extract it, then go through the files till you see the Clangen.exe file, then run it and if you're computer says something like, "This file might be dangerous" then just click show more and then run anyway. The .exe file should be in the (Download file)\Clangen. It is really hard to see so make sure to look out for the file the ends in .exe.