The change of the icon only means that your computers default player has changed..
To change it back to the way it was previously go to your shared/saved folder (outside of Limewire) you will find this folder by clicking on one of your files in your LW library and clicking explore...
Right click on one of your music files
Select open with
Select choose program
select the program you where using before it changed and tick the box that says always use this program to open this file type...
