Also, as a recommendation to Avast (specifically the Mac team):
All of my Mac third-party applications that use real estate on the toolbar have a "Preferences..." button right on the icon. If I click the Menu Bar Icon for, say, Dropbox, Google Drive or Day One, they each have a Gear icon, which pulls out to "Preferences..." that I can load. Some of my Menu Bar icons even have a direct line into "Preferences..." which I think is the default Mac application behavior (think: Time Machine, Bluetooth, or Displays). ALL System Menu Bar icons contain "Preferences..." so, my recommendation would be to add that to any application which uses that real estate. (Avast too!)