It also appears that the VST is not sending midi events, per se. I set up two tracks in Studio One 5 Pro, each with its own instance of Polybrute Connect with different presets. As expected, when one switches between tracks, Polybrute Connect prompts you to activate that instance by clicking "Activate." This works fine in the sense that it does change the preset on the Polybrute hardware, but no midi messages are sent by my DAW - see attached screengrab.