Wolf

I have BitTorrent pro on Android. Works perfectly, but there's one thing I can't find. How to deselect files once you downloaded them. I often download whole series, am not a binge watcher, so want to be able to delete files once I have seen then. But then BT just downloads them again when I'm online. There is a button to select and add files to the download. But as soon as a files is downloaded the only choices are to play the vid local or on an other app. Am I missing something?