Wow you seem to have more knowledge of the Program than the HTTrack coders do.
In the FAQ it says copy your cookies.txt to the projects folder which is
bullshit.
You have to replace the cookies.txt in your WinHTTrack installation
folder....

Also had a first unsuccesful try with cookies.txt in the project folder.
Then, after copying my cookies to the WinHTTrack folder and doing httrack.exe
--update i was succesful...