New iOS Google Authenticator update deleted all my accounts

To avoid this issue, make sure you've logged into all your 2factor accounts, and have the new Authenticator QR code ready -before- updating.

eg. For Google accounts: 'Move to a Different Phone' at https://accounts.google.com/b/0/SmsAuthSettings

IIRC this happened with an update to Google Authenticator for Android as well. They rolled out a new version that discarded all your old accounts, and removed the old version from the store. Quite a nasty surprise...

I believe this is related to iOS 7: https://news.ycombinator.com/item?id=6112077

Other discussion: https://news.ycombinator.com/item?id=6325760

Same thing happened to me. Presumably I can restore the older version from a recent backup, but this is pretty weak.