I've just got a dock I want to use, firstly I wasn't sure which folder to put it in but I think i've found it, but the actual problem is i come to change it and I can't. It just says in the "Dock Background" section the name of the dock but doesn't show a preview of it so I can't select it. I tried to change it to the original background of the dock but that doesn't work, it just closes the app and nothing changes. Anyone able to help me out? i'm on 1.1.1 btw.