Well rats.  I thought we were headed to a solution but the lack of support for the secondary monitor is a big oversight.  The render window resolution is limited to whatever my primary monitor settings are.  Text is fuzzy since it is upscaled from 1080 to 4k.  

Still looking for a solution but one may have to be provided in an update.  Not good to release a new version of any program without secondary monitor support.  It's a big screwup and so far looks like I wasted the money I spent on the upgrade.  All I got was headaches and an updated render engine which I can only use on my smaller monitor.

If this is how an update is released Poser is one the way to becoming obsolete.  Sad since I have been a customer since the first release.