Since the workaround is only temporary, I am in agreement with @bignick277 that a fix is still needed.
It's not meant to be a fix, just need to know if the test is repeated (by you all) that indeed the problem is gone - knowing this will help with a resolution.
Thanks for your feedback and help here.
Stardock Customer Service Manager
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Rebooting did nothing to fix my issue. (whether I rebooted with one screen disabled and enabling second screen once logged in, or rebooted with both screens enabled)
Tested the resolutions on my main screen at 3840x2160, 2560x1440, 1920x1080 and 1920x1200. I got the same result as you. When using dual screens, Deskscapes is only working when both screens are at the exact same resolution. If either screen is at a different resolution, Deskscapes fails completely resulting in a solid black background on both screens.
Just in case it matters, I should also note, that like Enoonami, my screens are also not only different native resolutions, but also different aspect ratios. My main screen is 16x9 3840x2160 native, and my secondary screen is 16x10 1920x1200 native.
I also tried changing the scaling options to see if that would have any affect, but that didn't make any difference either.
Hope this helps.