You can uninstall QuickOPC using following steps (x.yz denotes the version you have installed):
- Go to Windows Control Panel and select "Uninstall a program". In the list of programs, locate "QuickOPC x.yz Build m.n", and double-click on it. Alternatively, from Windows Start menu, select All programs -> OPC Labs -> QuickOPC x.y -> Uninstall.
- Press the "Yes" button when asked whether you are sure to uninstall.