Link to official webpage (in French).
Recent versions (2011) of the MCMTII, which have undergone a few evolutions since MCMTII has been described on the website, only work with the non-free PRISM software (for windows) in versions 7 or 8 or the Ascom driver.
The current source available from the download page is quite old. Here is a local copy of this file, version 220.127.116.11. A newer version will be requested soon as well as protocol documentation. It is developed by Alcor System, so does PRISM. The code in Delphi language for Windows.