Im using Solidworks 2018

I am unable to open Solidworks CAM NC Editor on it own. Meaning if I want to edit an NC file at a latter time, I have to launch Solidworks and from Solidworks CAM Operations tree post (or repost)  a toolpath in order to launch NC Editor. Then once the editor has launched open the file I actually want to edit. 

When I try and open NC Editor on its own I get a "Invalid or missing key argument given" error message. 

I there a way to launch the NC Editor directly