Receiving a Runtime Error could indicate corruption in the Musicmatch Jukebox configuration. Please do the following:
Double-click “My Computer”
Double-click “Control Panel”
Double-click “Add/Remove Programs”
Select “Musicmatch Jukebox”
Click the “Add/Remove” button
Select “Yes” if you are asked to verify that you want to remove any shared files
Open Windows Explorer
Navigate to the Musicmatch Jukebox directory (typically “C:\Program Files\MusicMatch\MusicMatch Jukebox”)
Select the files (but not the folders) in the Musicmatch Jukebox directory
Press “Delete” on your keyboard
Select “Yes” if you are asked to verify that you want to remove the selected files
Reinstall Musicmatch Jukebox
Reboot your PC