A recent AVG and Avast antivirus update is preventing DisplayFusion 9.9 from launching on some systems. If you're running into this issue, please update to the latest DisplayFusion 10.0 Beta.
It's pretty much done but we're having an issue with one of our build tools that we're waiting for their support to help us resolve. As soon as it's sorted out we'll be shipping 10.0 Beta 18.