When I put an audio or video file onto the track it just comes up as a soundless and visual-less sliver. I have reset the program by holding shift+ctrl while opening but it didn't solve anything. It doesn't do this with images of any kind, I've tested. This is movie studio 15.0 . I haven't used it for a few years but I'm certain this never happened before, and I don't think I could uninstall and reinstall it because I downloaded the software from one of those disks you can get at Staples, and they have install limits.
I'm using a windows 10 desktop if that matters.
I took this screenshot to show what I mean by the sliver. I have my cursor over it so you can see it easier.