You don't need to uninstall the app everytime. The problem is the update to the app is bugged and corrupted. Roku supports is terrible and they dont even know how to fix it. What you can do instead uninstalling and reinstalling the app each time is just to log out of your account on the app and sign back in and it should work. Unfortunately this has to be done each time you open the app until Roku gets their act together and fixes it permanently, but it's easier than uninstalling and reinstalling the app each time.
