The Gold Edition is FSX Deluxe Addition (FSX RTM = 10.0. After you activate Flight Simulator X, you can use all the features. To activate Flight Simulator X, close the game and then restart the game. How do I activate Microsoft Flight Simulator X Gold Edition? 7 Is there a free version of FSX acceleration?.6 Is there a serial number for Flight Simulator X?.5 Can you download FSX Gold on a new computer?.4 What is the difference between FSX and FSX Steam Edition?.1 How do I activate Microsoft Flight Simulator X Gold Edition?.