The info collected is annonymous and regardless the avast! version.
Official text:
“We want you to know that avast! Free Antivirus collects information from your computer that helps us improve our services to you. We remove anything that identifies you and combine it with the information from all of our customers. We analyze this data and may publish our insights, or share the insights with third parties. However, we promise we will never publish or share any of this data that includes your personally identifiable information and we will never use the information to target you or to allow someone else to target you without your consent.”