That if new update is not compatible with iOS 7 version then do not give update because it automatically updated and now it's not working.
Extremely sorry about the mess up! The crash on iOS 7 with the latest release was a mistake, and should be fixed in a release that has already been submitted to Apple and is pending review. As soon as the update becomes available, the app should start working again on iOS 7.
Horrible experience these winters for such an unprofessional update, which ruined the winters. If any update does not work it should not have been released , Also , I was impressed by the way application being built and the feedback been incorporated , However at a wrong time big mistake happened.
Now how to downgrade the app version in iOS 7?