OK, yes, that did it.
BUT
Now all my Library music tracks have a "!" saying the "original track could not be found would I like to locate it?
Duh?
So, I went here (which got me out of my previous troubles:
http://discussions.apple.com/thread.jspa?threadID=404492&tstart=0
Kay Marczoch:
To get access to your music:
iTunes Preferences Advanced:
untick "Copy files ..."
ITunes Menu File "Add to Library ..."
select the (standard) "iTunes Music" folder
iTunes Preferences Advanced:
retick "Copy files ..."
AND REPEATED THOSE STEPS
That got me to where I am NOW, i.e.:
1. TWICE as many songs as previously -- half of them play and the other half "!" "cannot be found".
2. ALL my old Playlists are now in new iTunes -- and all of the tracks in each Playlist are correct.
3. BUT, all those Playlist tracks are marked with the "!" "cannot be found" mark-of-death!
4. I am unable to Cut/Clear the "!" tracks in the NEW LIBARY (yes, one at a time!)
I suspect think there must be a way to "finish" this correctly -- but I am perplexed, confused, and LOST! HEEELLPP! 🙂