I’m currently an existing customer of Avast.
I have a license registered under an email which I’m no longer able to access.
Is it possible to migrate everything to a new email account from the old one?
You can change your email info via my(dot)avast(dot)com
You can change your forum info by clicking on the “profile” tab at the top of the page.
If you have a purchased license just save it to a flash/USB drive.
You might want to hide your email unless you love spam.