Click on Force Quit. Click on the app you want to quit. Click on Force Quit.

To uninstall Avast (and its annoying sidekick, Secureline VPN), launch the program. (To find the program go to the Applications folder--or just use the Spotlight Search function, which is a magnifying glass icon in the far upper right corner of your screen, next to your name and the date/time.)

How To Quit Avast

Avast For Mac Free Download

Avast Uninstaller

When the Avast dialog box asks you to Connect, click the little black triangle next to the word Connect, then choose Optimal from the dropdown menu. Then click Connect. Only after you have truly connected to the Avast network will Avast's menu options appear, along the upper left of your screen. Click the File menu and choose Uninstall. No backing up needed (to my knowledge).