scatwell , it's not possible to extract any versions above v9.0.43 at the moment.
Butch , you don't really need a user manual for these players. It's quite simple to operate them. To transfer music files to it, just connect via USB, go to its removable drive, and just copy and past files into the drive.
However, if you do want a manual, go to the Search Downloads here
http://www.mympxplayer.org/dload.php?action=search
and search for Manual. But most likely it won't make any difference.
What do you want to do with the player?