Select your OS version. Download. Install. Start the program.
If it is still unclear, please read the FAQ. :-)

Universal Windows Platform (UWP)

For Windows 10 and Surface.

Ring UWP

Win32

For Windows 7, 8, 8.1 and 10.

Ring Win32 (32-bit) Ring Win32 (64-bit)

Ring older releases
You can also access to Ring older releases.