My first suggestion is that you re download it from
GE's site and reinstall it to ensure you have the right version. I has some problems with installers downloaded from links in threads that had the right version number, but were in fact an older one.
Second, make sure that the check box to export the map and open it automatically is checked.
Third, make sure your system is configured to use the GIS viewer as the default application for the file type that is generated. I am right in the middle of a reinstall, or I'd find the file type for you.