> Unless you're killing it by pressing cancel, HTT
> does not redownload existing files unless they have
> changed.

And "Continue an interrupted mirror" attempt to do that, too.

If you have to interrupt a mirror, consider cutting the connection, and let
httrack finish pending operations, rather than aborting by clicking twice on
abort (or exiting the program). This will allow pending state still in memory
to be dumped on disk rather than being wiped out.