Thanks for answering! 
Yes, the weirdest thing is, that it shouldn't be possible to facilitate and changes of that magnitude via a few keystrokes. But as I said, my FTP client wasn't even open at that point in time. 
The problem is, that I can't just upload files, because I'd probably overwrite things I already changed (this is a multi-language setup).
I'll attach a screenshot so you understand what the problem is all about, that might make it easier to understand.
Code:
Screenshot:
http://awesomescreenshot.com/02fcvqp96