Sorry to hear you are having issues.
Deskscapes works fine on one monitor with win 1809 as you can see by the amount
of dreams I am uploading and running.
With multi Monitors know issue is still being looked into.
Try starting all monitors in the same 1920x1080 resolution at startup
and then make res. change after some say that works .
All will be notified when a solution is available .
Stardock Community Assistant