RF-X has been abandoned. When Knife Edge Software sold Real Flight to Horizon Hobby, the rights to RF-X were not included. KE had already stopped any development on it before the sale. There is no place to download updates, and in these forums all sub-forums (including any swap pages) for it have been taken down, since this forum was also transferred to HH. Ditto for any other product websites. You can try to install it, but if it requires any online activation, you will be out of luck.
RF-X was too far ahead of its time, graphics wise, and sales tanked due to needing what then were very high end computers. Many of the secondary features were not available when it was released, which further deterred sales Evolution is an advance of the older versions, with the older graphics - although it has been updated to run on DX11. It includes almost all of the old planes and fields from the expansion disks one used to have to buy seperately, along with some new. Via Steam, there are additional new planes/fields available for purchase.
