I had a random presention with a new video file of unwanted sub-titles. At first I thought the Apple tv app setting had changed - but no. Then I tried to find a solution in Infuse and failed.
The solution presented itself when I carried on watching the video in question and had to pause the video when the house phone rang. I hit the pause button which triggered the swipe down menu option - and there was the solution.
Presumable somewhere all of these secrets are laid bare?