How can I uninstall Avast without the uninstaller?

I deleted Avast from my MacBook using App Cleaner but there must still be traces of Avast on my laptop as I get the message when I try to re-install that it is already installed. How to I completely uninstall it from my machine?
Thanking you in anticipation.

Hello user1468, you should get a better response on the dedicated Avast Mac Security board: Avast Mac Security - Avast Community

Many thanks - will do.

You’re welcome. :slightly_smiling_face: