1. In few words, the application is ready for auto-clicking IMMEDIATELY, once you run it and press the trigger key that defaults to scan code 13, i.e. the key is ENTER (RETURN). For the scan codes of all the keyboard keys see MSDN resource: https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731.aspx.
2. Indeed, you are right, the Help text seems too complicated still. Though I've released a new version where the Help text is a bit easier to understand. Just run the application and press the 'Help' button to read the assistant text.
3. Also you ask about 'clicks/s' and 'stop at' parameters: they are independent. The program will click at 'clicks/s' speed and will finish at 'stop at' number of clicks. One exception is when 'stop at' parameter equal to 0: the program will be clicking infinitely, while the trigger key (default ENTER/RETURN) is being pressed.
4. If you are still confused, read the entire detailed text by pressing Help button inside the application window.
