I am not sure of anything. :-)
I just know that I can't export high quality video using Sonar Producer x64 and Windows 10 Enterprise.
I have installed the k-lite mega pack, Windows Movie Maker, VLC, and Media Monkey.
I have not been able to discover the problem. I think tomorrow I'll call Cakewalk Support ?
Maybe this is one of those cases where I have to install Sonar x86 in order to export the video files?