NEED HELP ACTIVATING FFMPEG IN KLITE MEGA CODEC PACK

I HAVE A SOFTWARE THAT IS REQUIRING THAT I ACTIVATE FFMPEG. I NEVER HEARD OF IT IN ALL OF MY YEARS. I AM SURE THAT IT IS PART THE THE MEGA CODEC PACK. I JUST CANNOT FIGURE HOW TO ACTIVATE IT. I FOUND AN ARTICLE ONLINE THAT SPOKE OF HOW HOW TO DO IT. THE PROBLEM IS THAT IT SAYS TO MOVE A FILTER FILE INTO A FOLDER CALLED: NW.JS
I HAVE USED SEARCH THROUGH WINDOWS 10 AND A COUPLE OF OTHER SEARCH PROGRAMS BUT NOTHING TURNS UP.
PLEASE HELP!! I AM A 69 YR OLD MINISTER WHO HAS MANY YEARS OF EXPERIENCE WITH WINDOWS. I AM ATTEMPTING TO PREPARE A PRESENTATION FOR MY SUNDAY SERVICE AND I CANNOT SEEM TO GET AROUND THIS ISSUE.

What is the name of the software that you are using?
What is the exact error message that it shows?

THANK OU SO VERY MUCH. I HAVE MANAGED TO WORK MY WAY THROUGH AFTER TWO DAYS. AGAIN, THANK YOU SO VERY MUCH. WISHING ALL OF YOU A VERY BLESSED DAY AND A MARVELOUS WEEKEND1