Avast Internet Security-Licenses

I have two licenses for Avast Internet Security for two computers. They are registered under the one email address.
My problem started when my credit card authorization failed for one of my licenses due to insufficient funds, (long story).
My Avast Account shows that I have two licenses, (and I have two customer numbers) but when I try to reactivate on the computer that was not renewed, it shows that I now have the same license as my second computer.
How do I change the email address for my second license on my second computer.
Or is there something else I should do.
I am sorry if I have not explained properly.
Wayne

https://www.avast.com/faq.php?article=AVKB24#artTitle (Orders and Renewals)

Thanks for the info Asyn.

You’re welcome.