Forgot main password

Sorry for such a dumb question,but, I have forgotten my main password. How can I recover it or whatever do I need to do?

Main password for what?

To access the avast settings : You would need to do a clean install if forgotten.

If you’ve forgotten the avast main password for the Passwords module - you’re out of luck since there’s no way to retrieve it.

We do not store your Main Password locally or on any server, to ensure your privacy. This means that if you forget your main password, unfortunately there is no way to recover or reset it.

https://www.avast.com/en-gb/faq.php?article=AVKB254#idt_410