I've been using Movie Studio for a few months now, I've gotten fairly used to everything. I'm working on a video and on one of my clips, It's cropped way inside the pan/crop output aspect. Of course, the background you see behind it automatically becomes black because there's nothing there. So I put a solid white background on the video track under it, I go to properties>Alpha Channel, change it to 'Straight (unmatted)' like I always do. But it doesn't change, it's still black. I tried restarting the program to no avail. I tried putting it on other alpha channels and got the same result. The video file is an mp4, like all the other files I've ever edited that always worked. Does anyone know how to fix this? Do I need to reinstall the program?
If it helps at all, I am using Windows 10, and my software version is 13.0.