is there a way to ask winHHTrack 3.44.1 to check if a file exists in the local
structure and if it does exist, don't re-download it.  I have read the bits
about how it checks the date and time and the warnings about cancelling a
download. 

I want to keep an off-line version in synch with the on-line version.  The
site is too big to crawl in one go so I have to cancel.  I do let the batch
complete though.

The problem is that PDF files are downloaded twice.  They are named
MYPDF-2.PDF and I effectively have double the site.  All the files have the
same timestamp and size.  

Is there a way for winHTTrack to say "if the file exists locally, don't
download" it does not need to check the server date and time, just ignore it?
Thanks