I found a very useful work-around for this!
Windows Start menu will respond to shortcuts placed in the folder C: > ProgramData > Microsoft > Windows > Start Menu > Programs.
For example, I added a folder "Favourites" under the latter folder.
Then, I added shortcuts to favourite files (Word, Excel, Video, etc) into the folder Favourites by (1) R-clicking on each file in turn (2) creating a shortcut on the Desktop and (3) moving the shortcut (copy/paste) to 'Favourites'. The intermediate step to the desktop is required because you cannot create a shortcut directly into C: > ProgramData ... Programs.
When I R-clicked on 'Favourites' > Pin to Start Menu (Start10) it was pinned to the Start10 menu and a mouse hover (or D-click) will display its contents as a list at right. Then, a single click opens the chosen file!