How to switch back to old Outlook Classic from new Outlook

Today the New Outlook version was again made the default. There is no button to switch back to Outlook Classic, when running the classic outlook app the new one still launches.

The issue can be resolved by modifying registry entry of UseNewOutlook from 1 to 0 for switching back to Outlook Classic.

Go to registry – Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences