Brushcutters

Hello , I would Like to Know How to Sharpen The Brush Blade for the 345FR :OEM Saw blade Scarlett 200-22 , I've Look All over The Husqvarna site and Found Nothing ? I would Have Thought That they Had A Vidieo or Something To Explain How To Some Place ??? Or Even The File & Gauge to Sharpen it ?? Did I Look in The Wrong Place ???

Thanks
Tom