Hi all. I have run into this issue before and it came up again with the new releases of Revit 2012. For those of you using Google Earth Pro 6 and the Globelink subscription tool that allows you to publish to Google Earth Pro: You might get a message saying it is not installed. You need to add the version number and key to the Globelink GEVersions.DAT file.
I did a short video on how to fix this. You will need to be able to search your registry for the proper key, but have no fear, I show you how to do that as well.