Amazon are constantly making changes to the Firestick via system updates. Sometimes they push down applications that we dont want (and we can’t remove) or they change permissions so that things that were working before (Custom launchers!) don’t work any more.
If it possible to uninstall system updates and also clear the app cache
(APK at the bottom of the page)
1. From the Main Menu scroll to hover over Settings.
2. Click My Fire TV.
3. Choose Developer Options.
4. Click Apps from Unknown Sources.
5. Choose Turn On.
Install all of the APK’s shown below