League Displays

So, I downloaded League displays and started it. I choose a wallpaper that looked good, and pressed finalize. Then I clicked activate and it said ''All done! Feel free to close the application and check your new setup.'' But when I went to check I didn't have the wallpaper I selected. I just had the wallpaper that I had before. Help me pls. I have now checked. And I can have normal wallpapers from the app. But not the screensavers.