Hey Brad (and others) thanks for the followup. I apologize but until I get past this deadline tomorrow I won't be able to reinstall the new version. After that I can take the time. Thank you and the Google team for looking into it.
I did receive a note from the team at Google earlier today:
Thank you for your note. Please be aware that a clean installation of
Google SketchUp Pro has DWG exporters. It appears as if the
installation was corrupt, and we suggest completely uninstalling SketchUp and
performing a fresh install. For more information, please visit the following articles...
Many thanks and I will report back. Hopefully it was just either a corrupt install or I do need to do a clean install. I had installed the new version on my home computer (an old G4 MDD) with no untoward effects and with full export capabilities. I was taken off guard by the install on my work machine not being complete, especially as I was already stressing about getting the work out.
All the best.
Karl Mead