Install 64 bit rhino

I recently had to wipe my drive and reinstall everything, really a pain, especially since I have upgraded rhino since v1. I realize it gotten easier, but now I can’t find 64 bit Rhino, only 32, where do I find 64 bit so I do it, and also missing is T-splines, argh…

Up to Rhino v4 only 32 bit, but works on 64 bit system
Rhino v5 with 64 bit support
All downloads linked here:

TSplines is supported by Autodesk
All versions listed here: