I also googled 'uninstall Musicmatch' and came up with this one:

http://www.oldapps.com/forum/software-support/1044-cant-uninstall-musicmatch.html

If Musicmatch Jukebox is not listed in "Add/Remove Programs" in the Control Panel, please do the following:

- Open Windows Explorer.
- Navigate to the directory in which you installed Musicmatch Jukebox (typically "C:\Program Files").
- Select the "Musicmatch" directory.
- Press the "Delete" key on your keyboard.

If there are Musicmatch Jukebox entries in your Start menu, please also do the following:

- Open Windows Explorer.
- Navigate to the "C:\Documents and Settings\All Users\Start Menu\Programs" folder.
- Select the "Musicmatch" folder and press "Delete" on your keyboard.