Match the resolutions, then let Windows revert back.
On my 1920x1200 - 2560x1600 - 1920x1200 setup, if I flip the center screen to 1920 DeskScapes will start. Then it restarts successfully when Windows flips the resolution back to 2560 after I don't click "Keep these settings" after 20 seconds.
It's annoying, but works.