Can't change my desktop background. Looks like I need to reformat.

@runfrodorun unlicensed yet :)

Nope, Ubuntu. Don't install i3, then go back to Unity, then install Gnome, then go back to Unity, then install cinnamon, then attempt to go back to Unity. This is not supported and will leave you with some unexpected behavior.

I got a self programmed tool for that if u want write me