I upgraded to Music Match 10 today but instantly wished I had not. I have used the free version for years but after the upgrade it did not recognize any audio CDs. I tried everything I could think of to get it working, and then some. I even ripped an audio CD to an .ISO and loaded it with Daemon Tools but no way: it refused to recognize any CD.
After spending a small fortune on CDs I was pretty upset that I could not play them on my MP3 player, until I remembered an old registry hack that allows you to rip MP3s with Windows Media Player. Import the following settings to the registry to rip MP3 with Windows Media Player. I have only tried with WMP 9 but I believe it works with 10 as well.
== Save as WMP-MP3.reg and double click to import ==
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MediaPlayer\Settings]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MediaPlayer\Settings\MP3Encoding]
"LowRate"=dword:0000dac0
"MediumRate"=dword:0000fa00
"MediumHighRate"=dword:0001f400
"HighRate"=dword:0002ee00
Disclaimer: Follow the instructions at your own risk and make sure you have a working backup!