When starting your new download project, you'll eventually see a button that
should be titled "Set options". 

Click it and a dialog box will appear.

In the dialog box, click the tab that should be titled "Browser ID" (or
something to that effect) and set the "Browser Identity" field to any other
option that doesn't have the term "HTTRACK" in it. I 

Secondly and finally, do the same for the "HTML Footer" field.

This worked for me (or else, manually typing the destination URL rather than
pasting it did).