David B: Thanks for your answer! That worked for me!

> I kept trying to get an older version of HTTrack
> (not sure which version) to work on an authenticated
> (password protected) area of a website. But, it kept
> failing. After upgrading HTTrack to version 3.49.2,
> I got it to work using two separate entries for the
> URL.
> 
> The first URL entry needed to be the one for the
> credential submission form (the URL linked to by the
> button pressed after supplying the username and
> password). Of course, this URL needs to include the
> credentials as a domain prefix, as in:
>   <https://username:password@mydomain.com/login>
> 
> I used the "Add URL" form to convert the special
> characters in my password to URL-friendly codes,
> then changed http to https.
> 
> The second URL entry needed to be the one that
> contained all of the content I needed to copy, as
> in:
>   <https://mydomain.com/myauthenticatedcontent>