How solve it:
Go to your desktop and open Display Settings.
Set Scaling to 100%.
Log out and back in (if requested as seen in attached image)
Confirm Scaling still set to 100%
Open Ventuz and you should have it looking right.
After it is open you should be able to then adjust to what ever you would like and it will adjust correctly. I have a few other programs that I have to do this with. Very annoying, but this work around will fix it for me.
* quoted from shermanpat
This is a working solution.