Overwritten files in Amnesia folder, Title Screen is wrong

[Paddy™]

Nah I think the way you did it was fine. My only other suggestion is that the problem could lie in your profile folder, which isn't located in the Steam directory.

It's possible that Amnesia's main settings were altered by the mod you installed, so you can try deleting the settings file and allow the game to recreate it the next time it's run. You can find the file here:

\My Documents\Amnesia\Main\main_settings.cfg

When you move/delete/rename the file, run the game again and see what happens.