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.
I've added this to our feature request list. We don't guarantee that feature requests will be implemented, or offer timelines on possible implementation. We'll be sure to let you know if we do add it to our planned features in a future version.