How do you update Clash of Clans on my kindle fire HDX?

To update Clash of Clans on your Kindle Fire HDX, open the Amazon Appstore on your device. Tap on the "Apps" section, then select "App Updates" to see if an update for Clash of Clans is available. If it is, simply tap "Update" next to the game. If you don’t see it listed, the app may already be up to date, or you can search for Clash of Clans in the Appstore and check for an update from there.