bravenet has changed since probably the last time you logged in which was probably over a year ago or something
so login
click the websites tab
and in that website manager table should be your website click on the link to it and then you are taken to your maintenance page for your site and you will see file manager and more there
Changed to Websites, still same problem. All it says is "Build a new website". I've been updating dozens of times in the last few weeks at autochtone.bravehost, but the file manager has disappeared. I can't edit my site, which is very disappointing.