Well, if you don't run the script/make the file change by hand; then you'd be running ok, but with an outdated mainhud file.
I didn't really check this time, but in general if they <include> some cool new window, I guess you just wouldn't get that to function.
If you did run it after the patch, the orginal script code wasn't right with the new format of the mainhud and it will not display the ammo window. I updated the script and you may all
download it again.
So, ideally you should update your mainhud after every big patch, so that you get new <includes>. If for some reason something changes, I will continue to update code.