I have the same problem of the app not running. It crashed yesterday and it will not open. The splash screen appears for about 1/2 second and then closes. I have an iPhone X running ios 14.0.1, and the latest version of the app. I closed all apps, reset my phone and still no help. I am thinking of deleting the app and reinstalling it. If I do that will I lose any data such as user added waypoints?