-As it is a Rhinoceros plugin, you first need to download and install Rhino for free: https://www.rhino3d.com/download/rhino-for-windows/evaluation, you will get a 90 days trial period.
-Then you can download and install RhinoRobot, and you will get a 30 days trial period. Download here.
-And finally you need to pick and download one or more robots from the robot library to open up in RhinoRobot.