Struggling to install Avast

Hello, some time ago I deleted avast via the trash bin without knowing that it had to be done with the uninstallation software, now I would like to reinstall it but impossible, the message “avast is already installed, please uninstall first the previous version”. How to uninstall it completely when I no longer have access to the uninstaller (since I deleted avast via the recycle bin)? Thanks in advance

PS : I’m on Mac OS

This should go in the Avast Mac Security sub forum - https://forum.avast.com/index.php?board=5.0

As an Avast User I can’t move it to that sub forum.