Well, it seems that I can not open playlists that have been created in MusicBee with Windows Media Player. I don't want to use Windows Media Player, except that is the easiest way for me to synchronize files to my MP3 player (Cowon D2). If MusicBee can open with WinAmp, those playlists are compatible with Media Player. I am open to suggestions. I am happy with MusiicBee overall. I have looked at several, MP3 Boss, Helium etc, but for my purposes MusicBee seems to fit nicely. I have an extensive mp3 collection and other managers have difficulty with large databases.