So, I have been asked to remove a menu item on a website running Movable Type.
So I log in, and try to figure out WHERE those templates can be edited. I finally find something that looks real, edit it, update the page and NOTHING HAPPENED.
I then log in to the FTP and discover that ALL pages example.com/about/whatever.html are stored as plain HTML pages in exactly the places where the path tells (whatever.html is stored in /about/ etc)
Is there some kind of hard-cache going on, that I can disable, or flush somehow?
It's likely that you need to republish files [the circular icon next to the Tools menu].
MT does allow for template module caching, but if you're editing templates via the MT user interface, then it's not likely this is the problem. Just republish, and you should be fine.