Thanks for the application.
I played a little bit with it, and I confirmed that the problem is the retina resolution.
This application what it does is cancel the retina resolution, so what ever resolution you select, (even the default at the time the application opens) and press ok, then the retina resolution is canceled and the manual support is working.
And as far as the support is concerned and your mail, they don't have a retina mac display. And even if they have, it is not activated.
100% confirmed retina resolution problem....