svptube-dl Error

Hi, until recently svptube-dl was working for me; I was able to download youtube videos.

When I try now, I get this error:

Line:73
Char: 3
Error: The system cannot find the file specified
Code: 80070002
Source: (null)

I tried re-downloading the script file as well as ffmpeg.exe, with no luck.

Does anyone have any idea what's going on?  Downloading youtube videos is very important to me.