There are at least two sites willing to migrate MyFamily info.  
spokt.com    Charge $65 to migrate and $29/year.  It is a professional looking
site.  They only show one page.

goclub.us    Is free, but will accept contributions.  Looks much like
MyFamily.  He shows you an example of what it looks like.

I'm sorry HTTrack won't work for this. 
 Elaine