Before I ever flew my Sig Kadet Senior Sport, I practiced on my computer with RealFlight 7. I hooked one of the video ports on my desktop to a large screen TV and spent hours practicing take offs, touch and go landings, and even a little aerobatics. I haven't been in the air since December 2015, so I decided to get the controller (a Tactic 6 channel) out.
I went to their site (see above) and downloaded the latest upgrade (it does not work with Windows XP) to 7.5, free for owners of RF7. It is a rather large (225 MB) download, but it only took a few minutes. It includes a pdf of the 7.5 manual.