You haven't said which OS you use.

Windows:

1. Go to Start>Settings>Control Panel>Add/Remove Programs

2. Click on Change/Remove Programs

3. Select Limewire in the list that appears

4. Select Delete/Remove/Uninstall


Mac OS9/X:

1. Go to the folder Applications/Limewire/UninstallerData

2. Double click Uninstall Limewire