Do you have the .Net Framework (4.0 or newer) installed? If you are unsure, run this installer. It will install the .Net Framework if you don’t have it.

If you know that the .Net Framework is installed, please see the Windows Event Log, and send me any exceptions related to the server. You should also send me the server log.

Note: Older versions of the server doesn’t open a window, it just adds an icon to the system tray. See: How do I make sure the server is running?.