Your new monitor is set to be Primary display? If so, Fences will recognize it as your main display. You will need to rearrange to move your Fences to the secondary display.
Fences v5 is an upgrade, you will need to pay for Fences v5 to be able to use it. Do know Fences v5 come with new layout engine which will manage your layout better on multi-monitor system. Refer here: https://forums.stardock.com/528229.
Also, note that older version user will get discount to purchase Fences v5.
Thank you,
Basj,
Stardock Community Assistant
