The file under PC software contain the MUSICMATCH Plug in for your Key Ring Audio player. 1. Download the respective .zip file into a temp directory of your PC. 2. If you have lost the installation CD, download the latest version of the MUSICMATCH JUKEBOX from http://www.musicmatch.com 3. Unzip the file and then double click to install the plug in automatically. 4. Connect your Key Ring Audio player to the PC and then launch MUSICMATCH JUKEBOX. 5. The application should now be able to detect your Key Ring Audio player and you may now transfer music files onto the player.