I got the song import to work, but every time I try to import too many at once it gives a bunch of errors. I found I could do 20 or 30 at a time, but I have hundreds. When I select 50 or 100 it imports some of them and then starts giving errors and I have to go back and get those again.
And then when I finish getting all the songs in Stage Traxx, then I restore the backup file. And again none of the songs in the playlists are linked. They are all red, and when I go to edit they all say file cannot be found. But all the files have been imported.
Also note, before I restored the backup, the song list was not red and all songs could be played. But then importing my V2 backup messed them up.