Are you wondering if you’re running the 32 bit or the 64 bit version of Office 2010?
Here’s how you could quickly find out which version you’re using.
Notice on the right of the version number it shows that this copy of Office is 32-bit.
As mentioned before, this is the most common version of Office 2010.
You’ll want to select x64 versions of addins.
Now you’ll always know which versions to download and install when there’s x86 and x64 versions available.