If you have already purchased a legitimate subscription, you can find your activation code by navigating to within the app interface. New version 24.12 - Avast Free Antivirus / Premium Security

: Modified software often causes system crashes, performance drops, or conflicts with other applications. Legitimate Features of Avast Premium Security

Using unauthorized versions of antivirus software defeats the purpose of having security installed:

: Users can download a trial of the full Premium Security suite directly from Avast to test all features before committing to a purchase.