As mentioned in <http://forum.httrack.com/readmsg/15535> Rc-1 also redownloads
unchanged files.

14:39:50	Debug: 	Changing link extension
download.httrack.com/httrack-3.40-2.exe to .e.delayed

14:39:50	Info: 	engine: save-name: local name:
download.httrack.com/httrack-3.40-2.e.delayed ->
web/delayed/httrack-3.40-2.e.delayed

14:39:50	Debug: 	Final type for download.httrack.com/httrack-3.40-2.exe:
'text/html'

14:39:51	Debug: 	File confirmed (size test):
download.httrack.com/httrack-3.40-2.exe (3345)

size is 3.5 MB not 3KB