Disclaimer: MIDI Newbie here...
That Emulator Pro software looks interesting. I'm trying to do something similar on an Android touch device, albeit only attempting to control Piatnoteq and not any additional DAW.
The Android application I am using is called DAWOSC. So far it's great for switching presets, but for adjusting various Pianoteq tuning parameters I find it less agreeable.
Ideally what I would like, when switching to different presets within DAWOSC, is to have the various sliders, and controls which I have set up to adjust hammer hardness, volume, etc. be automatically updated within DAWOSC (as they are inside of the Pianoteq interface) to reflect the actual settings of that preset. This doesn't happen and I'm not even sure this is possible with Pianoteq as I see no ability to transmit settings via MIDI to a controller.
Are your controls updated within Emulator Pro to reflect that actual state of a Pianoteq preset or are they just generic adjustment controls which don't understand the current values of a Pianoteq preset?