I used CAL Cube Timer and it worked.
-Plug in and turn timer on, start CCT, and go to options
-Under "Keyboard Timer" uncheck "Use keyboard timer"
-Then go to File>Configuration>Stackmat settings and select the correct "mixer" under the pull-down menu
-At this point, you should go back to the main window and try to test it to see whether or not you need to check any boxes in the "Stackmat settings" tab. Each box will fix the minutes, seconds or hundreths value (this will make more sense if you encounter the problem. With my QJ, I had to check them all 'cause I was getting times like 15:178.189)
As for using with PPT, no luck yet. So far (without messing with any code) I can only get PPT to sense that I've plugged in a timer and that I've started the timer. Once I start my QJt PPT records my time as ~0.2 seconds, even if I just let my QJt run.