It appears that Win10's Edge location of FAVORITES is different than previous OS's.  Previous locations was C:\Users/[username]/Favorites.  This location still shows the favorites if one uses IE.  However, the Edge browser looks here for FAVORITES

C:\Users\[username]\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\User\Default

So once I copied my favs from C:\Users/[username]/Favorites to C:\Users\[username]\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\User\Default  my Favorites now are listed in Start10.

This is a drag to have to maintain 2 locations....