Since Haja10 is not available on the official Google Play Store, you must "sideload" the application.
Go to Settings > Security (or My Fire TV ) and toggle on "Apps from Unknown Sources."
Always run the downloaded APK through a site like before installing. This ensures the "updated" file hasn't been bundled with malicious code. 🚫 Avoid Personal Data
The update will be rolled out automatically. Just ensure your device is connected to the internet, and you'll be updated in no time!