Problems with playing Music!

hello evr1!

I wanted to ask whether anyone knows how to stop the songs you play from "Library" to automatically appear in PLAYLIST. i don't know exactly, but when i last closed limewire a box opened up, and of course i failed to read it. when i started lime wire again, i apparently had the latest version "4.16" i had to go through steps to "install" lime wire 4.16. now when i want to play a song from the library, everytime i press "launch" inorder to play a song the song automatically goes to playlist. this is really annoying to me! PLEASE if ANYONE KNOWS HOW TO STOP THIS I WOULD APPRECIATE YOUR HELP! i really don't want to delete lime wire form my comp. and lose ALL of my music. thank you~!~!!!!!!!!!!!!!!!!!!!!!!!!!!