Pretty sure they're no different than the other models; link here:
[Link: remotecentral.com]

If no luck with those, extron MLC 104's are about $30 (and good to have around). Extron does have a MU6300 driver, so you'd install that, then hook the serial out to your computer serial in, use a terminal to echo incoming messages, then just hit the buttons you've programmed with what codes you want & copy what shows up in the terminal.