I assume you are referring to the JAM station:

http://www.guitartricks.com/jam.php

However it is not a download but rather an application that is running in your browser and needs internet connection and a full member subscription to run.

The tools you can download under http://www.guitartricks.com/downloads.php are (both Windows and Mac versions available)

Ultimate Chord Finder
Ultimate Metronome
Full Control Video Player
Reference Tuner