I can't change a beatmap's background/image! it says "Deleting backgrounds makes osu! ANNNNGRRRRRRRYYYYYYYYYY" or something like that. I did the drag and drop method, it's an image file, not a shortcut. Help?
I'm pretty sure the background images are put in during the creation/editing process. Background files aren't skin types. I apologize if this info is false, but it's all I can think of.