I'll keep posting suggestions as I think of them:
It probably isn't this easy, but try it - who knows ...
Create a new Favorites folder, then use your text editor to build the desktop.ini for the Favorites folder using the lines in the code box below. If nothing else, it will be a folder with a star
Fairly standard stuff - the folder name and icon from shell32.dll
Here's the contents of desktop.ini file in the Favorites folder on my other machine.
or ... How about creating a new user profile and comparing the registry entries for favorites. I looked at the other machines registry and there really aren't too many once you strike the Edge browser keys. I thought about posting the keys from my side, but it would be more expedient for you to do it side by side after exporting the HKCU key while logged in to each user.