When I opened up limewire today, it didn't have the player at the bottom and all of my music is opening up in windows media player. I don't know if this is something to do with limewire itself, or if I have to download it again? Anybody have any ideas???

You can change it back to LW's media player by going to LW's menu bar, Tools > Options > Player, and make sure the option is ticked. If it already is, then uncheck, press apply, leave options, then go back and enable it. LW's media player is not the most reliable though.