I would siggest that the next updated version of SBM have a pop up window for all new users to tell them where the backgrounds are for their kits

or

Make it available in the kit when you click on embelishments, actually I like that idea better, because if you want to make a shape out of a background, and I don't know if I am doing this the hard way, but I have to do a search for the kit I want in C drive and that will bring the kits up, because they don't know up in the gallery.