Brazil 2 requires Rhino 4, 5, 6 or 7.
Download for Rhino 6 - the latest full version.
Brazil is an end-of-life product. Brazil will not work on Rhino 8.
Both 32-bit and 64-bit versions are now available for Rhino 5. Here is complete a list of the changes...
If Brazil doesn't work on Windows XP, download and install this Microsoft patch.