How to update Firefox OS based phone Peak

See below my new Firefox OS based phone called Peak from Geeksphone.com. I used to have Firefox OS 1.0 inside when I got the phone. Since Geeksphone published 1.1 update in July 2013 I decided to flash my Peak.

I read through these instructions: http://firefoxosguide.com/firefox-os/how-to-flash-new-rom-on-your-geeksphone-keon-or-peak.html/ and followed steps from 1 to 7. The only problem I got had to do with the Windows drivers. My laptop is running Windows 8.1 Consumer Preview. After double clicking and installing a file called android_winusb (see picture below) flashing started as promised. In need of drivers look inside the zip-package: http://downloads.geeksphone.com/drivers/usb_driver.zip .

After restarting Peak started first time setup. Device information shows there is a new OS installed (see picture below).