could not load main init file?

[prokras]

the file couldn't be opened. I don't know how. it said 1kb (4kb on disk). I checked the file size if it was 0kb but apparently it wasn't 0kb.

btw, I use OS X 10.9, does it affect the game?

edit: now the demo simply won't launch maybe because I already bought the game via Windows 7, the demo is now replaced with the full version in the steam library but I still want this issue to be resolved since it would be such a hassle to switch to windows back and forth.

edit2: how to delete the demo manually and properly? it still resides in my hard disk.