On your iPhone:
1. Delete the Amen app (you will lose your downloads, everything else will stay the same)
On your home screen, hold your finger gently down on your Amen app and tap Remove app
2. Then tap Delete
3. Reinstall the Amen app from the Apple App Store
4. Type your email/password in Already have an account, sign in
You should now have full access to Amen.