Bios Update and Drivers for Herobook R64G19072929

Hello,
I reinstalled Windows 10 on my Herobook, but after some Windows Updates, the Wireless Chip is missing in device manager.
I read somewhere, after a Bios Update, this issue is being resolved.
So I´d like to ask for the Bios Files, the files in the official download thread wont work and there isnt a working instruction for the update.