Penumbra: Overture graphical glitches and freezes

[Kedjane]

http://support.frictionalgames.com/entry/77/

More specifically? If I go into the link below "This update is for versions 1.0, 1.0.1 and 1.0.2 of Penumbra: Overture." I get redirected to some 403 (not 404, which I perhaps wrote in the first post).
"You came from "(none)" and wanted to go here "/downloads/updates/ep1/win/penumbra_overture_1.0.3u.exe", which you can't because: "403". " pretty much.