As I don't care for the Windows 10 Start Menu, I looked for alternatives and found that great great freebie 7Stacks. Basically, you make a folder (even nested folders) of shortcuts then make a stack and it works like a menu.
Listary is fantastic, but it goes to subfolders only from the parent (at least I think it does, still new). So I wondered if shortcuts would work in Listary. And they do, perfectly. I made my Shortcuts folder a Listary favorite and now I have nested choices of both files and apps.