If you have an Apple TV HD or 4K, you can enable automatic updates, which will ensure that your apps, especially the medici.tv app, are always up to date. To do this:
Go to Settings > Apps
Enable automatic updates
To manually check if an update is available for the medici.tv app:
Open the App Store app on your Apple TV
Click on the search icon
Type "medici.tv"
Select the app
If an update is available, you will have the option to update.
Apple TV is a trademark of Apple Inc.
App Store is a trademark of Apple Inc.