What version are you currently using?

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.