Hello,
Sorry to hear you are having issues. Need to know more on your issue.

1. Windows 10 or 11? Also need its full version and OS Build number. Please use Winver.exe.
2. Deskscape full version number.
3. Post a video showing your issue so we understand it better.

Thank you.
Basj,
Stardock Community Assistant.

You will only be able to delete backgrounds one at a time. You cannot select multiple backgrounds for deletion within the app.

You can, however, open the explorer folder where the backgrounds reside and delete multiple backgrounds.

Static backgrounds are located in: C:\Users\"your user name"\AppData\Local\Stardock\DownloadedDreams

Animated backgrounds are located in: C:\Users\"your user name"\Documents\Stardock\Dreams