Yes I did the same thing.
Uninstalled 11.02, downloaded and installed version 10 (I had the old product key), and Liquid Dream reappeared in:
\My Documents\Stardock\Dreams as LIQUIDDREAM.DREAM
I configured it, sand, droplet size, clouds, etc.
Uninstalled version 10, backed up the .dream file to another folder, just in case.
Reinstalled version 11, and there are now 2 liquid dreams showing in the app. One in the public users folder and one in my documents folder. When I select either one in version 11 and click the settings button, I get the old error, "This dream has no user configurable settings".
So version 11 reproduces the same error regardless of the dream file taken from version 10 or version 11 of DeskScapes.
But I was at least able to apply the animated wallpaper by double clicking the dream file from the folder within Windows Explorer. It applied with settings I configured through version 10.