Alternatively, use the terminal:
Visit the JDownloader Download Page and download the Linux Installer (.sh file) . jdownloader steam deck
Installing on a Steam Deck is a straightforward process that allows you to manage high-speed downloads directly on your handheld. While JDownloader does not have an official native SteamOS app, it is easily accessible through the Flathub community package or as a manual script. Method 1: The Easiest Way (Discover Store) jdownloader steam deck
Optimal setting for overnight use: 4 chunks, 2 files. jdownloader steam deck