Thank you for the explanation. It would appear that I've once again proved how 'tonto' I can be when I really try hard!
I thought I was paying for the printed book and a download of the .pdf version, the latter because you had indicated that shipping of the book might be protracted (up to 45 days), and I want to get on with a full understanding of QCAD.
As I already own the QCAD prof (Order Number: 87873
Date Ordered: Sunday 03 January, 2010) I clearly don't need to download it over again. May I ask, (although it was entirely my error), that you would be so kind as to offer a refund?