It is possible that the download link provided above does not refer to the intended version.
If you are looking for PyKeylogger, you may try searching for a download link using
Google.
Review
PyKeylogger is a free open source keylogger. It is currently available for Windows, and Linux. It is primarily designed for personal backup purposes, rather than stealth keylogging. Thus, it does not make explicit attempts to hide its presence from the operating system or the user.