iRegatta 3.35.0 unfortunately crashed on all devices with iOS versions lower than 6.0, like the iPad1.
Now you should be able to downgrade again to the latest working version.
App store will tell you that an update is available. If your device hasn't iOS 6.0 or higher, it'll ask you if you want to install the latest version for your device, accept that and you'll get version 3.30.1 and you should be back in buisness.
Sorry for the inconvinience.