Well, in the latest development version of H9 Control that we're testing in house, we added a setting option to create a virtual MIDI port for the app that one can use to route MIDI from other apps into H9 Control and through to any connected devices.  But we're going to need to test this feature for a while to make sure that preventing H9 Control from quitting doesn't cause any unexpected or hard to solve problems.  If everything goes well, this feature will be in the next release which will likely come in January.