I took a look and scook is right, there is a #include directive in the script. After a little investigation, I found that this is, apparently, a known issue with AutoHotKey script compilation. The AHK script itself works as expected, but once it's compiled into an executable, the key bindings get hard-wired in. bummer - wasn't expecting that.
I'm still investigating (do you know of a work-around scook?). In the meantime, has anyone actually updated the KeyBindings file? If so, I can do a quick recompile with that while I continue to look into it. 'just let me know...
It's getting kinda late here, so I'll have to pick this up again later - but thank you all for the interest!