So if you have been using Google Authenticator to provide your 2 factor login codes. Another, and I believe better option is Authy.com
This allows you to install on your phone, and for me my macbook and it backs up to the cloud, allowing restoring and transfer between devices. And you can run it on your macbook/PC instead of needing the phone client.
To transfer from Google Authenticator to you have to disable and re-enable your 2FA and then generate and enter the authy generated codes at each of the websites where you have 2FA enable. But from there use it just like GA.
So all good really. Check it out: https://authy.com/download/