When you first download the fix it will be in .zip format.
You must have winzip or WinRar installed on your pc to open this.
You will need to right click and unzip/extract it first to a place of your choice.
That will give you a folde rcalled LEATRIX LATENCY Fix 1.22 with 3 files in it.
Just use the Install.vbs file to install it.
Works good for me on Win 7.