FXAA/SMAA seems to have incompatibility with patch 1.0.8.0, because I also have EFLC 1.1.2.0 (instead of the latest patch 1.1.3.0) and FXAA works fine there. The issue should also happen with EFLC 1.1.3.0, but I haven't tried FXAA or SMAA on that patch.