I somehow managed to fix it, it's working normal again, but it seems I can't change settings while in the game. Whenever I change some value in "sweetfx_settings" I have to exit the game and relaunch it again in order to apply those changes. Before I just could change settings and they took effect while I was alt tab in the game. Can I fix that? It's pain in the ass to constantly leave the game after changing sweetfx effects.