My name is Allen. I'm the guy that wrote the program you are having issues with.
There is an option in the program under "tools" for you to tell the program where ffmpeg.exe is.
In the file you unzipped to install, there is a clean version of ffmpeg.exe. Place that anywhere on your hard drive. Then under tools and options, just tell the program where it is.
I don't think the issue is that this program doesn't work with 7. I have had many that tested it while 7 was still in beta and they had no issues.
From reading this thread, it looks like Cptn Jack had no issues either. Just make sure you tell the program where ffmpeg is.
Be sure to read at my blog http://samsungscmx20.blogspot.com
, where you downloaded the program for a step by step on how to use the program.