Go to the Settings page on the Fire TV Stick's home menu Select My Fire TV Click About click 7 times on fire tv Stick 4k and go back Scroll down to Developer Options Turn on Apps from Unknown Sources Accept the warning message about installing external apps Open the Amazon App Store and search for Downloader Install the Downloader program Type in the URL address or code of the file to download Click Go Wait for the Fire TV Stick to download the file Click Install when the suggestion appears Wait for the installation to finish Go back to the Home screen Find the See All button and click it Find the application at the end of the list