Problem Avast Free 2017 Renewal

Hi everyone - My Avast Free 2017 (version 17.9.2322) will expire in 15 days. … on subscription information it appears the button renew now but when I press it offered a choice
of upgrading (column on right with GREEN background) or renewing the Free version (column on left
with WHITE background) but it doesnt appeared any selection box at the bottom of the WHITE column it only appears a text “this is your actual protection”. In The column on right with green background appears a selection box but I dont want to update. I want to renew my avast free antivirus subscription.So i want to ask you how can I renew it?

I will be very grateful if you help me.

Many thanks

Edith

Update to the latest version (18.6.2349): https://forum.avast.com/index.php?topic=221320.0