This is a known issue with SF Pro 14. The developers are aware of this bug and will be fixed in a future update. .. don't hold your breath though.
That said, installing the 32 bit version or Pro14 will load the help files for both the 64 and 32 bit versions, Both versions share many of the the settings and will coexist without issue. Installing the 32 bit version does not count as a second activation either.