@kjsimon, all your data is still here. You delete the app and then go back to the App Store or google play to download the app again. Then rather than registering, you tap I'm already registered. Input your username and password. Then you'll get back in. Please let us know if you want a new password now before doing this. Thanks.
@michealarae, please tell us what type of phones you have. Please also try deleting the app and reinstalling it with your username and password. Then let us know if it resolves your problems. Thank you.