You mean to use it in the regular Google search?Yes. A small improvement would
be to write also
"site:forum.httrack.com".

I've been trying to use this already, but the results somewhat weren't great
at all, that's why I haven't proposed it.
I'm seeing though now more and more search results. Perhaps Google's index
gets updated more and more when we are "routing traffic" to them asking for
this website here ;-)

What is your topic you were trying to follow up on, if I may ask?