On some systems, MediaMonkey fails to 'stick' as the default Media Player.
To prevent this from occurring:
1. Go to Tools | Options | General | File Types and make sure that
the file types that you wish MediaMonkey to be used with are checked
off and that 'Re-associate File Types on startup' is checked off.
2. If another media player is still used by default, then it is usually
because that application has some sort of 'agent' that is configured to
always associate the application with Media Files.
o To stop Windows Media Player from doing this, click 'Set Program
Access and Defaults' from the Start menu. Locate 'Media Player' and
change the default application to 'MediaMonkey'.
o For other applications such as iTunes or Winamp, you'll need to go
into the program's configuration dialog and disable any functionality
that automatically re-associates the application with media files.
Note: on Windows 7, Vista, or XP, you can access the 'Default Programs'
option via the Start Menu to verify/validate file associations.