Originally Posted by xendula
No, I use it for Calibre as well. I have not managed to import my PW boks into Calibre through the "send via USB" from amazon option - but good point; I may have to figure out how to do it.
Just download them onto the Kindle itself, then connect USB and drag them from the "Documents" folder into Calibre (sort by date to find the new books). You could use "Transfer via USB" if you wish, but I find the method I've described to be easier, especially for multiple books.