Looking for mod Difficulty and Tweaks v6

Starting a new mega-mod game.  I have all the latest editions of the mods I want in my game except Difficulty and Tweaks v6.

I went to "kerzenburg" and downloaded the file Diff_Tweak.exe from Gibberlings 3.  I cannot extract or run the file.  I get errors both ways.  If I move the file to Notepad, I see the entire contents of the file.

I search Gibberlings 3 for the Difficulty and Tweaks file but found nothing.  I search Gibberlings 3 for the Mix Mod file but found nothing.  Searched the Internet for "Difficulty and Tweaks v6" and found some listings.  Nothing had the file.  I did get one reference for Difficulty and Tweaks v7, but it was just a forum.

Two questions.  Is there a place I can get a working copy of Difficulty and Tweaks v6 or Difficulty and Tweaks v7?  Can I substitute Mix Mod v6 for Difficulty and Tweaks v6 and not have a problem?

Thanks for any help.

Tom