I was having bad frame rate drops in Update 1.
To fix it I edited this line in “falcon BMS.cfg”, the default is 0 (max), which seemed to be the cause. By editing this to 2 my frame rates are better than in the original 4.33.
set g_nAnisotropicValue 2 // The max anisotropic filter value to use if anisotropic filtering is ON in the setup UI. Valid values: 0 = max available (default), 2, 4, 8, 16
Hopefully this will work for you also.