I've just run this keylogger finder. It runs fine on Windows 8. It runs the .exe file from the zip folder.
To use I disabled internet connection and disabled security software. Used wordpad, notebook and scribbled on Paint. Ran the program for three minutes. Interestingly it picked some parts of Avast for some reason but as it's my AV I could ignore. It also picked up Hotspot Shield even though the VPN service wasn't running. Again I can ignore that. Otherwise it looks as I'm clean. If you are going to try it you might consider running it a bit longer than I did.
Worth a look anyway.