This instruction shows how to install the CNS and the programs that are working together with the CNS. There is also a more detailed instruction as video on: https://www.youtube.com/watch?v=GAkGwP0vsH0
The CNS and all the other programs shown here can be downloaded for free.
The other programs are:
Java, the runtime environment on which the CNS runs
KiCad, a program to create electric circuits
NGspice a circuit value calculator
FFmpeg a program to export videos