Cybercriminals know that people searching for license files are eager. They package the ".lic" file with a keygen or crack that contains Trojans, ransomware, or cryptocurrency miners. By the time you unlock Avast, you may have already installed a backdoor into your system.
This is the safest method. Visit the official Avast store. Prices fluctuate, but Avast frequently runs promotions (up to 60% off). You pay via credit card or PayPal, and the license file is emailed to you instantly. Avast Cleanup Premium License File
No. Avast will simply disable the premium features and constantly nag you with "Your subscription has expired" pop-ups. Cybercriminals know that people searching for license files