Yes, uninstalling and reinstalling will delete your database and annotations, so don't do that unless we can't find a way to get things working for you. Your signature shows you are running version 2.6.8. so that is the latest version. Which one of those two devices is the problem occurring on? This will allow me to identify which crash may belong to your device. Also make sure you are running the app with WiFi enabled so that the crash reports will be sent to HockeyApp.
Thanks,
Mike
Thanks,
Mike