RealSim is available in two (2) versions...

• RealSim Lite - a free, limited use, non-commercial version.
  
• RealSim Professional - a fully functional version that requires the purchase of a commercial license.

Download the latest RealSim software...

RealSim V1.2
RealSimSetup.exe (22MB)

For a limited time RealSim will update itself to the latest release
using the update service.