I'm sorry about the issue. As long as your Kindle fire is connected to your Wi-Fi / wireless network name (on your kindle, go to the Wi-Fi / Wireless option / menu to check), then your kindle should be already updated. To confirm, please click on the Amazon website below:
, then there, select your kindle model, and then click on the option "Determine Your Software Version", then follow the instructions there to check if your kindle has the latest update version
; if no, then follow the instructions there in order to update your kindle
Please reply at the box below to continue. Thank you.