Crash on vertical synchronising (can't even disable, startup crash too)

[FredWP]

So I enabled vertical synchronising and the game crashes. Now I try to launch the game again, but it crashes.

The launcher does not feature enable/disable vertical synchronising, and I did not find the configuration file that holds this setting, so I'm stuck.

Please fix this.

[NeatNit]

Go to My Documents/Amnesia/Main/main_settings.cfg (open with notepad)
At the end of the line starting with "<Screen Width..." there should be a setting called Vsync. Set it to "false".