They are both RED.
I have scrolled through the whole script and there are 5 red items:
reaper.JS_Dialog_BrowseForFolder
reaper.JS_Window_Find
reaper.JS_Window_Destroy
reaper.JS_Window_ChildByID
reaper.JS_Window_GetTitle

I find it strange that they are not installed! I have followed the steps in detail. I have also just tested the latest Beta pack for SWS Extensions with no change.

So how do I find them and how do I install them? (never done this before).