The downloadable installer sometimes won't properly detect the bit depth on your computer depending on the configuration of your computer. We will provide you with a stand alone 64 bit build of the program which bypasses this error message and allows you to successfully install the program.

Here it is: https://app.box.com/s/ipgjpfbev01t2ddu8ms5sx42v64ss12y

Ignore the preview not supported message and download the program.