Steam Penumbra Collector Pack version crashes on launch

[vbhokie94]

I had all three of the Penumbra games installed (Overture, Black Plague and Requiem), so I deleted all of them and only reinstalled Overture. This seems to work as now the game actually launches and at least so far the game plays with no problems. Don't know if I'll have to uninstall Overture when I want to play the others, but I'll deal with that later if necessary.