I have now run out of ideas of how to fix the issue. You can now extract and move these panels to an external screen with the undock current panel button next to the panel name.
Updating the driver to a digital display with the 1920x 1080 resolution (Did not override the non-PnP driver) In MadMapper 4 Scenes and Cues are integrated in the tools panel, below your Input and Pre-view Output views.
Sometimes I am able to get the non-working monitor to change resolution to 1920x1080 after reinstalling the drivers many times(though it still shows as a DVI Digital Display monitor in Nvidia control panel), but then after a PC restart the settings are lost all over again. One of the monitors works fine still, but last night the other monitor switched from being a normal 'Generic PnP' monitor to a 'Generic Non-PnP' monitor ? I have two ET.LU50D.006 monitors from Acer plugged into an Nvidia Geforce GTX 1060 3Gb graphics card.