Just Download the file from here
https://www.amazon.com/gp/help/custo...deId=201756220
This is the file
Download Software Update 5.8.5.0.2
Then follow this procedure.
Download it in PC then transfert it to the device using usb cable
and launch the update from the kindle
first connect the device to your pc
connect your kindle to your pc
and copy the file to the kindle
Be sure not to drop the software update file into one of the folders within the Kindle drive
the main folder
eject the Kindle
On your Kindle, go to the Home screen
tap the Menu icon
and then select Settings
Select the Menu icon again
And then select Update Your Kindle
Tap OK to perform the update, it will on and off many times.