Mm, disturbing.. maybe it was someone you know? a friend perhaps, that opened your server.cfg file while you were away and stole the pass.
The 1.cfg file.. someone must have written it, in conole you say "write "x"" and it writes a cfg file, have you accessed it and looked what's written inside?
Could also be a keylogger, clean your computer from spy wares and not viruses.
Host as normal, I'm pretty confident nothing will happen, if it does then I'm not much of use
anyway, hope everything turns well
Error is our enemy!