I am running 8.0C. I am not getting any previews now in the preview window. Pictures don't show up at all. Video files play the audio but no video. I have 'auto preview' selected in the toolbar and when I click on a photo or video file in the explorer window the 'start preview' button gets selected but it never displays anything in the preview window. Help! This has always worked and can't imagine what caused the change. I don't have an external monitor connected and the 'video preview on external monitor' button is not selected.

Thanks in advance!!!