If you already have RealFlight 7.0 installed, you can download the 7.5 update for free through the RealFlight Launcher by selecting "Additional Options" and then "Registration/Updates". Key Features of RealFlight 7.5
RealFlight 7.5 introduced several major enhancements that still hold up for RC training today: Realflight 7.5 Download
Copy the entire contents of the installation disc to the root of a USB drive. You must rename the USB drive to RFV7_1 for the installer to recognize it. If you already have RealFlight 7
Use an external USB DVD drive to run the disc. Realflight 7.5 Download