Bongo 2 requires the latest version of Rhino 5 or 6 for Windows.
Bongo 2 has the same minimum system requirements as Rhino 5/6 for Windows.
The latest full version of Bongo 2 is available from here:
Try before you buy. The evaluation version of Bongo works unrestricted for 30 days It continues to work indefinitely as an animation viewer but it will no longer allow animations to be edited.
The evaluation download is the same as the full release version above. After installing, when you open up Rhino you simply choose "Evaluate" from the list of available options.
Evaluation versions of Bongo can be converted to full standalone licenses or floating licenses from the "Licenses" page in the Options dialog. You will need to purchase a license to obtain a CD key to unlock the product, or add to the Zoo.
Bongo 1.0 is compatible with Rhino 3.0, Rhino 4.0 and 32-bit Rhino 5 for Windows.