Once you have installed the VMware Horizon Mirage client, there is no way to change the configuration (from one URL to another for example) from the system tray icon. However there is little executable tucked away that will allow you to change the configuration of the client.
Its called the Wanova.Desktop.Configurator.exe and is located in c:\Program Files\Wanova\Mirage Service. Just run the executable and you will be greeted with this handy little applet which among other things will allow you to change the URL of the Mirage server, whether HTTP or HTTPS is used and logging level.
Author: Dale Scriven