I have an older ipad that will not update past ios 10.3.3. I have the latest Coursera app. I've been able to download videos and watch them in airplane mode but now the app just crashes when I open it. I deleted and reloaded the coursera app and had the same thing. I then did a factory reset on the ipad and started from scratch. The app does the same thing. I have to have this functionality to watch videos on the airplane. Before I buy a new device, is there anything else I can do?