It is not possible to control both MixEmergency and your audio with the Behringer DDM 4000 mixer. This is because (for some strange reason) the crossfader of the mixer can only be assigned to either MIDI or audio - not both at the same time. Because of this, you would need an additional MIDI controller to control MixEmergency. You can pick up relatively cheap and portable ones (such as the Korg nanoKONTROL) that will do the job well. What graphics card do you have in your MacBook? The video output should work in both full-screen and windowed mode. Is this reproduceable (i.e. does it happen every time you run it?) This is the first report I've heard of such a problem - so, if it is a problem with MixEmergency, then I would like to get it fixed. The purchased version of MixEmergency will disable the "demo" watermark over the output and also enables the recording and exporting feature so that you can record and export your video mixes. When you purchase MixEmergency you will also have free software updates until at least MixEmergency version 2. Version 1.2 shouldn't be too far away now. As far as visuals go: we are planning to add a few more visualisations in a future release (though this will obviously be free to download, as you'll download them with the demo).