MusicMatch on Monday sent out an e-mail to customers warning them that if they install iTunes for Windows they will no longer be able to use the MusicMatch Jukebox software with their iPod. “As a valued Musicmatch customer and iPod user, we want to alert you to a serious software conflict caused by iTunes for Windows,” the company said in the e-mail. “Apple iTunes for Windows prevents Musicmatch Jukebox from working with the iPod by deleting critical files used by Musicmatch. If you install iTunes, you will not be given a choice between Musicmatch Jukebox and iTunes — Apple makes this choice for you.” The e-mail included detailed instructions on how to uninstall iTunes and go back to using Musicmatch. Apple and Musicmatch were partners when a Windows-compatible iPod was first released.