From your question I gather that instead of using the Mac-specific installer (http://www.tersus.com/#Id=3567), which would have taken care of your tutorial-related issues, you've performed the cross platform installation procedure (http://www.tersus.com/#Id=241), but you probably missed the last item (#10) in the "Online Installation Procedure" section there (switching to the Tersus Modeling perspective).
With regards to updating, since 2.1.31.4 is the most recent stable version, and assumming you have the stable update site defined, there will be no updates. If you wish to be updated to the latest versions, as they become avaialble (currently 2.2.3), you'll need to add the latest update site, as explained in item #3 of the above, as well as in http://www.tersus.com/#Id=239.
Regards,
David
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