Not sure if anyone will see or respond to this for that matter. My older REGISTERED/PAID-FOR version MC 12.0.534 seems to no longer look up any CDs at all. If I look up using WMP, then right click the drive in MP then 'update from CDPlayer.ini' the response is "Information for this CD is not found in CDPlayer.ini. Just to reiterate, the CDs I'm looking up are pretty mainstream; Rod's Stewarts The Great American Songbook, John Ledgen Evolver. Again, no CD look up seems to work any longer.
Also, Media Player is not the default player for a CD. It's not even listed as a when a CD is inserted, nor is it listed if I go to my control panel to set my default programs. Yet, I can still open MC and then play the CD. (I hope, I really hope, that these issues aren't a form of planned obsolescence to encourage an upgrade. I had that kind of fun with Music Match years ago)