Do I still have my free Avast protection after my Pro Plan expires? I do not want to renew the pro plan but I do want to keep the free version. Do I need to do anything to make sure I have the free service?
You have to uninstall avast Pro - when you start the uninstall - you should get the option to install avast free.
Details here: https://www.avast.com/faq.php?article=AVKB27#artTitle