I could do without C3D, and generally don't need support.  (Except to buy the program.  I guess I should have been warned when I had trouble even buying the program at their Web site.  Usually companies make it easy to give them your money.  ;-)

But a couple of times now, I've been caught by updates that don't work correctly, or break previous functionality.  In one case, I was told I had to remove Vue entirely and reinstall, because the update they released was corrupt.  It's really aggravating.  It's gotten to the point where I'm afraid to install updates.