I was looking for a video player for Win 10 and read a couple of reviews about this one. It sounded OK, so I downloaded and installed. I was not impressed and decided to uninstall it. However, every time I try to uninstall, I get a popup saying the app cannot be uninstalled because it is being used by another application. Task Manager shows no apps running, so how do I find out where 5KPlayer is being used in order to stop it?