Reality Engine Server executable can be found under the path C:\Program Files\Zero Density\Reality Control Applications\4.25\EngineServer as ZDRealityEngineServer.exe. On double clicking the ZDRealityEngineServer.exe, Reality Engine GUI will launch in full screen mode and has no minimize, maximize or close button. Tough it can be minimized using WIN +D keys on keyboard or use ALT + TAB keys to switch between other opened windows. The icon will be also added to Windows System Tray section on task bar, you can perform couple of actions by right click on Reality Engine Server icon and use Show GUI to maximize the Reality Engine or Exit Reality Engine Server.