Just figured out another way when you cannot trick the app by downloading or deleting account anymore: Use "dual apps" feature onto the app.So I figured out how to fix the problem of "Data Exception". You just go to settings then delete the account without logging in. No need to clear the data or cache. Everything will be back from when you first downloaded and the modified feature won't disappear. This time, you do just like the admin said, download all eps to watch them offline.