You may not be searching for the correct terms. See the Installing JW Broadcasting tutorial. Another reason may be that your device is not currently supported. JW Broadcasting is not supported for first generation Roku models.
The JW Broadcasting app is free to download and use.
Roku requires a valid credit card when you create an account because not all content in the Roku Channel Store is free. You will only be charged if you choose to make a purchase. For more information, visit Roku’s support section.
The Play With Subtitles option is temporarily unavailable for some recently published videos on the JW Broadcasting channel for Roku, and it will be a few months before it is available again. In the meantime, Roku users who need these optional subtitles can see them on a computer or mobile device using tv.jw.org. To enable subtitles there, click the Display subtitles when available box on the Settings screen.
A friend who is familiar with Roku or JW Broadcasting may be able to help you. If your question has to do with your Roku device or account, visit Roku’s online support. If you are having issues with the JW Broadcasting app, please contact our nearest branch office.