The icon for ActivManager can be found in the top-right corner of the screen near the time. If the icon is not there, then that means that the program is not running. To run it, open a Finder window and open /Applications/Promethean/ActivDriver/activmgr. Double click the icon, and the ActivManager should appear. Or, if you’re accustomed to the Spotlight, just search for activmgr.