If I am not mistaken, I believe you are supposed to copy over the old .exe with the updated one.
I just checked and in the download there should be a file that says, READ ME FIRST.
Replace the file YellowFin.exe in the main folder using the one in the folder named "Update V2.0"
The main folder is standard installed in C:\Program files\Imagenex\YellowFin
Hope that helps. It should fix the problem.
Robert