That is certainly a different from any PopUp I have seen for Avast Free, but whilst it is an old version 11.1 it wouldn't be valid for the " Avast Free Antivirus version 7 or older" statement, older as in earlier than Avast 7.
The problem I face (and many other helpers on the forums) is, it is many years since I have used Avast 11.1, so we will be very unfamiliar with it.
What Operating System are you using, or is there a reason why you are still running avast 11.1 ?
I can only assume that you tried to register it in the same way as 60 days ago ?
e.g. clicking on the Registration form option in your image.