Glitch when I try to composite images. My image shows up then flashes black. I can't use any of the tools. It works up until I have another image to composite. I'm new to photoshop and got CC so I could work on my project at home, I've never had this kind of problem on my computer at school. I tried to make a new selection but my image just goes black, I move my mouse and it comes back for a second then turns black again. I can't go any farther with my project.