Penumbra Requiem low FPS on good pc

[TFEF]

Actually, I think the load previous save solution was for everybody, not just people who updated in the middle of the game. Maybe not.

Vsync seems to lag on monitors with high resolutions for me. The log says that you play at 1280x1024, which isn't a terribly high resolution. You could try disabling that, not sure how much it'll do.