Yep, you are so right. It's funny they don't mention that in the ads because they could sell a lot more upgrades that way. If anyone ever has Realflight questions they can write to [email protected]

I wrote asking about this upgrade and here's what they said:

>>> Hello,

You can upgrade from G3 to RealFlight 6.5 by purchasing the RealFlight 6.5 upgrade disc (GPMZ4488). This is a full version of 6.5 that works with your G3 controller.

For prices and availability of RealFlight 6.5 upgrade disc (GPMZ4488) or any of our other software titles, please try contacting a Great Planes dealer near you or on the Internet. We are sorry, but we do not have any sales information here at Technical Support