I live in England. Local time here is 20:25 as I write this.
A computer running windows 7 is good enough. That's what I have on my laptop. Once downloaded, why would you want to open the firmware on your computer?
Basic instructions:
ST16 first. Power it up and insert the sd card with only the firmware for the st16 on it...nothing else... into the slot. then do the update. Once the ST16 is updated then you can update the aircraft using the sd card with only the firmware for that on it...nothing else. Once that is done, then rebind and calibrate.
Watch this video for the full instructions. It's about an earlier version but is still relevant for the latest.