Once in a while, you may need to clear the cache on your Amazon Fire to see app updates. Clearing the cache will refresh the data that the Amazon Fire is calling to help apps display quicker.
*Note - If your app is a beta app when clearing data you'll have to add the app to the web-tester again.
To clear the cache on Amazon Fire:
Go to "Settings"
Click on "Manage Installed Applications"
Select your app
Click "Clear cache"
To clear your app's data, select "Clear data".