I've got it!!
Strange though ... I copied from old machine / Saved Workspaces ... which show the date created, but not the given name ... and !! are XML files.
Then copied to new machine - into Saved Workspaces ...!! ... now are HTML files ??!!??
But it worked - I have now all custom workspaces, with their given names, show in Bridge > Window > Workspaces.
Not really an answer why and how, but its done.
I left the other / Archived Workspace folder empty.
Cheers
PS: Bridge was shut down while copying to AppData.