It runs fine for me on Win8-64bit however I do get quite a few crashes. You can set the program in Win7 & 8-64bit to run in Windows XP compatibility mode which may stabilise the program more.
One caution - do NOT install to Program Files or Program Files (X86)! In Win7 those are write-protected directories, and Hexagon tries to save a number of its components in its home directory when you use it. Just install to C:\Hexagon or some other such (I used C:\DAZ-3D\Hex, but that’s just me being me).
Thats a good tip, thanks. I will reinstall to see if it makes it crash less.