WIM: Updated my nVidia Drivers and then installed the *new* DisplayLink drivers. Both appeared to have installed without a hitch.
No change in my status of the two USB monitors. Only one works as before

so I don't think the new DisplayLink drivers were able to address our situation. I even tried using a completely different USB port than before (on a separate host adapter) and while everything appears to have installed properly (audio, webcam, USB monitor... all in the Device Manager without any errors appearing), only one monitor works at a time.
Same as before when both connected, one is active. When I unplug the active one, the other one becomes active.
I really don't want to reinstall everything and revert back to WinXP to get both displaylink monitors working!