To get the LED out just remove the blade and shake the LED housing out the end. Since those don't come with the quick connect option you will need to cut and splice wires or desolder the old LED star and solder in a new one.
The switches are glued in so using something long and rigid to scrape the glue from the inside around the switch allows it to come out. From there it comes to rewiring for the new switch. Also you need to select and wire the proper switch. If you have a stunt saber changing the switch to something more elaborate can involve quite a bit of rewiring and may require extra parts like my Scorpion needed.