Now Office 2016 is available you want to upgrade, but you are not sure what version of Office you are currently running. In my blog post yesterday I already provided a couple of links where to go if you upgrade from Office365 Personal/Home or Business. But to do so you need to know what is installed on your machine today.
To help you a bit with this Microsoft put all the version information for the various versions into one location:
Now identify your version and upgrade to the right edition.