There are four different possiblities to access the Avira Control Center:
You double-click the Avira icon on your desktop
Or you go to Start → All Programs → Avira → Avira Desktop → Start Avira [PRODUCTNAME]
Or, in case Avira Online Essentials Launcher is not installed:
Do a right click on the Avira icon in the system tray
This will open the product menu
Move your mouse to the menu item Start Antivirus Pro and click on it to start your Avira Control Center
Or, in case Avira Online Essentials Launcher is installed:
Do a left click on the Avira icon in the system tray
This will open the Avira Online Essentials Launcher which will display the status of your Avira features.
Move with the mouse over the “Antivirus” area and click the Open button to start your Avira Control Center.