Hi, Basically you remove the cloth bit of the door card, ull have to remove parts of the handle to do this.
Once you have that off wind the window down so you can see the clamp bolts behind where the cloth bit would of been. Undo these not fully just enough for the window to slip out.
Takes abit of jiggery pokery but it will come out. Probably not the best description, but ull understand when you are doing it.
When you have done it once its fairly straight forward.
Good luck!