The Launcher application is a switchboard that presents the same shortcuts as those available from the Start menu. It serves as a starting point for work with QuickOPC. In addition, for users of Windows 8 and later, it allows them to easily navigate the various QuickOPC shortcuts, as the Start menu in Windows 8 and later is essentially broken for applications that install a hierarchical structure of shortcuts.
The Launcher is only available on Windows, when QuickOPC has been installed with the Installation with the Setup Program.
The Launcher application is also accessible from a desktop shortcut, from the Programs group (Start menu), and from the Quick Launch bar (note that Quick Launch isn't visible by default; to enable it, see https://support.microsoft.com/en-us/kb/975784).
You can use the tree on the left side to select a group of actions you are interested in, and then view the actions in the list on the right side. You can launch any action by double-clicking on its icon, or by selecting it first and then pressing the "Go!" button.