FM 14 creates runtime on Mac with both 32 and 64bit.
You can use our Runtime Shrinker to remove one bit depth as you never need both.
On Windows, you install FMA in both 32 and 64bit to use each to make a runtime.
You can have both versions 32bit and 64bit installed. The license agreement only allow you to use one copy at a time. The download comes with links to both 32bit and 64bit version of FM for Windows. If you don't have your download link then you can contact FM support to have it resent.
Took me a while, but got the link/download and yes, contrary to some FM info, you are right you can have both 32/64 bit installed on the same PC or in my case Mac with Parallels.