At nifty.org some files have ext and some don't its random.
Whenever I download it produces files that end in /file namehtml.html These
are text files, that normally end /filename  with no extension. 

Is there a way to have it just leave the file alone and not add anything to it
if there isn't anything already there? But also they have actual html files
that I do want to end in .html 
I am using the most recent version of Httrack. The only workaround I've been
able to get work somewhat is to just not have it use any ext which doesn't
work for html pages very well and directories. 
Any help would be appreciated.