License expired message after formatting laptop and installing 1Password

I have just formatted my mac and installed El Capitan now my 1Password 3 license is saying it is expired:

The license key you entered is for an older version of 1Password. Please upgrade your license to receive a new key.

I have tried "I have lost my license" and the license key in the email is also not working.

1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided


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