If you have ftp access, you should also have ssh access. If you can connect with ssh, you can access the config object in mongodb.

Hello, i would like to make special category when everyone can make thread - but only author of a thread can watch it and edit it, hide it from other users. Is it possible somehow to do? Closest way to this i was when i changed permissions, i disabled access to threads but enabled ability to create threads, but then nobody can see them obviously soo...is theres any way to do this?

@człowiek-nuż that list just displays the files that are loaded by the browser when you visit the site. There's no way to hide that, and there's no point in hiding it, either. That list doesn't expose any sensitive information. If nothing from plugins shows up there, then that just means that their forum doesn't load anything from the plugins when you visit it.