Yes it is 64-bit
When i attempt to generate a printed document the process fails.
i get the following message while proceeding through the generate dialog:
The version of Microsoft® Word you are using has some known limitations with documents that contain a large number of list items (~1500). To avoid this problem, please download the latest Office 2000 service release (SR-2 or later). For more details, please see the online Help.
In the Output view panel i get the following message:
"A supported version of Microsoft Word does not exist. Please install Microsoft Word 2000 or newer."
@A Scribe
I suspect your issue is Rh is simply not seeing the 64 bit version of Word. The error message is wrong but it is the one Rh throws when it cannot find Word.
Email me via my site with a link to this thread and request an Adobe produced file that I can send you. I will need to know exactly which Rh version you have including the build number.
I would get Word changed to the 32 bit version regardless as you may have other issues with the 64 bit version. Microsoft advise the 32 bit version for compatibility with other apps.
@Joel
Did you run Word 2010 before attempting to generate the printed document?
See www.grainge.org for RoboHelp and Authoring tips

@petergrainge