Since you cannot add every application known to humanity to your list, it would be nice to have a feature to have a custom cleaning check like this
Name: [ Dynamic Wallpaper - Old pictures ]
Clean Folder [ %UserProfile%\Pictures\Dynamic Wallpaper ]
[x] Files [X] Older than [ 1 ] [ Week ]
[X] Matches pattern [ *.jpg, *.png ]
[X] Folders [X] Older than [ 1 ] [ Week ]
[X] Matches pattern [ *\Backups ]
[X] Empty
In the future community can even share their own recipes. Well that's open for disaster for sure, but useful nonetheless.
Cheers