Hello,
can you see the Avast GUI after you double click the Avast icon? The menu is on the top left, and is contextual for the app that is in the foreground, this means that unless you have the Avast GUI focused, the menu will belong to other app. You can also clicl on the small icon of Avast on the top right and select Open Avast Security to open the Avast GUI.
Kind regards,
Ondrej Kolacek