This is basically for the people who miss the "Add to Playlist" button of addware Kazaa. So to get back the old right-click option so it appears in either My Kazaa, Search, Traffic and so on just follows these 3 easy steps.
1. Click the options tab, and click KL extension options.
2. Go to interface, which is at the top of the left menu.
3. Unclick the second and third options and Walah! (Note: You can also control what happens when you double click an item, by clicking on the 4th option here)