Some of these things seem to be very persistent and hard to get rid of, but try removing the app by highlighting it on your Home Screen, pressing * on your Roku remote, and choosing the "Remove app (or channel)" option. Restart your Roku device by selecting "System restart" under Settings->System or Settings->System->Power (depending on your device) and then add the app again once your device restarts. It may not help, but it's worth a try.
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