The information in this article applies to:
The Nitro Pro Office add-ins do not appear in the MS Office 2010 applications (Word, Excel, PowerPoint).
A known bug in Nitro Pro prevents the Office add-ins from functioning correctly. This issue only affects the 64-bit version of Office 2010.
This bug will be resolved in the next version of Nitro PDF Professional, however there is a workaround to the problem until the product is updated.
By default, Office 2010 installs itself as the 32-bit version unless it is manually configured to install as 64-bit. If you cannot see the Nitro add-ins in your Office 2010 applications, then it is quite likely that you have the 64-bit version installed. Re-installing Office 2010 with the default installer options will ensure that the 32-bit version will be copied onto your computer, allowing the Office add-ins to function correctly.