SecureLine renewal License

How do I upgrade a license to a multi-use license? My Secureline is about to expire and was only a single user license. In My licenses in my avast I can see it but cannot modify it. Apparently it will automatically renew in a few days but I dont want the single license - I want a multiple device license. I see no way to mofiy settings for any of the licenses I have. Any suggestions?

Best you submit a ticket: https://support.avast.com/Tickets/Submit

I believe I changed mine right on the Avast main site, it took some looking but there is a place in your account and payment some where to change how you want to pay and there are, if I remember, 3 diff choices from which to choose from