> to avoid redundant downloads. However, after 3h and
> at approx. 17.000 Files and 2GB of data, Winhttrack
> gets veery slow and almost freezes. I assume this is
> because of the breadth-first search and the
> corresponding memory-consuming parallel scanning?
How much RAM do you have?  For a project that big you would probably want 1 or
2 GB.  But yeah it's going to slow down when the program has to juggle that
much data.