I'm using httrack so far and it's working fine, except it 
is not downloading the linked .pdf files off of my online 
class, even when I add a 
+http://assets.apexlearning.com/*.pdf, the upper site 
they're hosted on (in quite a few subdirectories however)..

I assume it should download EVERYTHING on the main site 
itself, apexlearning.com (within the context of my link), 
yet it seems to be only getting the things off the 
courses.apexlearning.com site, and not assets.etc.etc 
where the .pdf's are located for the course. Even with the 
filter.

What am I doing wrong? Thanks. I know it's probably a 
simple mistake.