Sorry, you'll have to manually update to the new beta 4. Just download and install from here:
http://www.displayfusion.com/Download/Beta/
With beta 2 there was a packaging issue that I caught after roughly 10 people had downloaded it. I guess you were one of the lucky (or unlucky) 10. Once you update to the new beta it will work as expected again.
Once you update to the new beta it will work as expected again.
