Hi If you want the copy of the drivers try:-www.ca-software.com/technics/download/ select KN7000 or PR804 from the list.
Check out this site they have also a pile of styles under the KN6000 these will go into your PR804 and all is FREE!!!
hope this is of help regards John.

P.S.Please fill in your profile location (country) as It helps with pointing you in the right area, I am from the UK. the site I have listed is German, the downloads are zips and will easy ,even if you don't speak German it is a mater of following the boxes they are in the same order!!.