Many of you have notified us that the current public version of Unibox doesn't work properly with the first developer preview of OS X 10.11 (El Capitan). We are not sure if this will be fixed in a later update of OS X, but for now we added a workaround to the latest beta version of Unibox that you can use if you are already running El Capitan. Please let us know if you still experience any issues.