Hi, Xavier Roche
  Great to see you.
  I am a developer using HTTrack now. I found most 
questions were focused on the usage of HTTrack. 
  I have read this opensource project for weeks. But feel 
depressed to find few documents for developers, such as UML 
diagrams or sequence diagram, etc.
  I searched in the forum, and found the same problem as 
mine(http://forum.httrack.com/readmsg/3537/index.html?pid=0&days=10000&js=1&lang=en)
  Can you upload some docs for developers? or docs about 
modules' function or diagram are appreciated.
  Thanks for your kindness in advance.
Best regards,
Parker Huang