Why use 2 program (1 web base, 1 desktop application) to configure Reply Plus Base station IP address and when to use what?

If you know the base IP address, then use the web application by entering the IP address as URL in the browser to start the "Digi Connect ME configuration and Management" and there is no need to locate and install the Digi Wizard. However if you don't know the base IP address then you have to install the desktop application and run the Digi Wizard desktop application.