There is no documentation... but it shouldn't be too hard to figure out either.
1. Once you log in as an operator, there will be a button that allows you to open the operator window. After you do that you may have to click the online/offline button in the top right. But before you do any of this, you have to log in as the administrator and configure departments and operators.
2. WinApp is developed by a third party, and unless you have a serial key, you will not be able to use it for more than a few minutes. Additionally, since it is a third party application, we cannot provide support for it.
3. When you are in the operator screen, you will be notified when a chat is initialized (AKA. Someone wants to talk to you)
4. What browsers and operating systems are you using (for both client and operator)?