Hello,
The good news is that you can use the pasteboard to copy your library data as tab separated text.
I've just tested this on my 22K song list and it worked like a charm (may require some time to process, don't care).
NB: Only displayed data is copied so check which columns are enabled.
You can alternately open the "(Home)/Music/QMidi/QMidi_Library.sql" file with any SQL database reader.
Mixage Software
www.mixagesoftware.com
support@mixagesoftware.com