Typically, your Sling TV app will automatically update on your Android TV. If an update does not automatically occur, follow thee steps below to check for and install any available updates.
Return to your Android TV home screen.
Scroll down to Apps, then scroll right to open the Google Play Store.
Scroll down to My Apps.
The top bar within My Apps will display any available updates by app. Click on the Sling TV App if it is available under updates.
Now click UPDATE.
Your Android TV will launch an App Permissions form. Press Accept to start the installation process.
Allow the download and installation process to run its course.
Once the update is complete, click OPEN to launch your newly updated Sling TV app!