a caf was dragged and dropped into Windows 7 Pro into Audacity 2.0.3 and did not open. What next?

I’ve never used a .CAF file, but take a look at [u]this post[/u].

If “nothing works” you can look for a 3rd party conveter and convert the file to WAV before loading into Audacity. Or, find a MAC and convert it to WAV.