itch.io

You could be right, though it appears to be something to do with the cooktool altering the original. 

Both versions load fine in vscode, but the post-build version is all on one line and has additional info from your "Customization" section.

Before:

{

   "name": "rmmz-game",

   "main": "index.html",

   "chromium-args": "--force-color-profile=srgb --disable-devtools",

   "window": {

      "title": "Merauders",

      "width": 1280,

      "height": 720,

      "position": "center",

      "icon": "icon/icon.png"

   }

}

After:

{

   "name": "rmmz-game",

   "app_name": "My New Game",

   "version": "1.0.0.0",

   "main": "index.html",

   "chromium-args": "--force-color-profile=srgb --disable-devtools",

   "background": false,

   "js-flags": "--expose-gc",

   "nodejs": true,

   "window": {

      "width": 1280,

      "height": 720,

      "icon": "icon/icon.png",

      "id": "",

      "min_width": 0,

      "min_height": 0,

      "title": "Merauders",

      "resizable": true,

      "fullscreen": false,

      "kiosk": false,

      "position": "center"

   }

}