Not sure why it would be "stuck". Try holding your phone in Landscape mode when you launch the app, see if that let's you get to the proper settings.
Regarding losing your plans, history, settings, etc - you should enable the sync option (Menu -> About -> My Account -> Sync Devices -> Upload). Do this once and it'll keep those files in sync on our server, and you can download them as needed if you reinstall, or if you move to a new device.