Amnesia opens a mod instead of the actual game??

[Neqquify]

So I downloaded the full conversion mod Penumbra Necrologue some time ago and played it through.

Now when I try to open Amnesia - like, the ACTUAL game, not the Penumbra mod - it just opens the Penumbra mod instead? Even when I open it through the Launcher.exe where you can adjust all the graphic and sound options and stuff before launching the game, it just launches the Penumbra mod and not the actual game.

So umm... Please help? Do I have to uninstall and then install the whole game again and download all my custom stories and mods again to get it working, or is there any easier way to fix it??