hts-in_progress.lock is definitely from httrack.exe. I delete it and it comes
back when I run httrack.exe.

I added -vz and here's the info that displays. Doesn't really shed any more
light on the issue other than to show where it's crashing...

09:52:46        Info:   engine: init
09:52:46        Debug:  Cache: enabled=2, base=C:\\My Web
Sites\\ITSharePoint\ht
s-cache\, ro=0
09:52:46        Debug:  Cache: rename C:\\My Web
Sites\\ITSharePoint\hts-cache\n
ew.zip -> C:\\My Web Sites\\ITSharePoint\hts-cache\old.zip (00A0E95C
00A0C95C)
09:52:46        Debug:  Cache: successfully renamed
09:52:46        Debug:  Cache: size 0
09:52:46        Debug:  Cache: no cache found in C:\\My Web
Sites\\ITSharePoint\
hts-cache\
09:52:46        Info:   engine: start
09:52:46        Info:   engine: check-html: primary/primary
09:52:46        Info:   engine: preprocess-html: primary/primary