lylejk wrote:
Also, you have to understand that the shellout script come with preset links for programs that you may or may not actually have installed.

This is an excellent point.
Try re downloading Shellout and put a brand new one in the plug-ins folder. Open it in Notepad ++ as it see's and saves python files correctly. Look at the program lines and see if the paths match your Xnview locale. Example
programlist = [
["XNView", "\"C:\\Program Files (x86)\\XnView\\xnview.exe\"", "png"],
Do this by opening any folder and then browsing to the "Program Files" folder in C directory.
Question.
Is your Xnview the portable version? If so it wouldn't be in the "C:\Program Files" folder unless you moved or unzipped it to that location.
Another question.
Did you create a folder named PF by any chance? Your Shellout program line suggests its located in the PF folder in your C directory "C:\PF"
Rob would not have put that in there as default location. So it must have been edited.