@ susie56: when you download a .dream file it is best to put it into the DeskScapes folder manually.
Download a .dream file and select "save" (To desktop will work fine.)
Open DeskScapes and select "Add/Remove Animated Desktops"
Drag and drop your saved .dream file into the folder. Done.
Then just choose your dream by either the DS control panel or Right-clicking your desktop and select "Personalize/Desktop Background/DeskScapes Animated Wallpapers.
Double clicking the dream file instead often sends it off into the ozone somewhere.