The file fpccovert.conf looks like this:

Z_CUT_DEPTH = -0.5MM
CLOCKWISE_ROTATION_IN_DEG=45
WORKING_AREA_WIDTH = 4IN
WORKING_AREA_HEIGHT = 4IN
WORKING_AREA_LEFT_BOTTOM_POINT = 0,0
DRILL_AUXILIARY_HOLES = true
DRILL_HOLE_IN_ORIGIN = true
MILL_ORDER = BOARD NETS UNCONNECTED_PADS THERMAL_PADS THERMAL_VIAS TEXTS
DRILL_BIT_DIAMETERS = 0.2MM 0.5MM 0.6MM 0.7MM 0.8MM 0.9MM 1MM 1.1MM 1.2MM 3MM
N_VERT_CIRCLE_APPROX = 28
ADDED_CONN_WIDTH_HALF = 75UM
ADDED_PAD_RADIUS = 75UM
ADDED_VIA_RADIUS = 75UM
Z_START_POSITION = 10MM
Z_MOVING_POSITION = 2MM
Z_MILL_DEPTH = -0.2MM
X_TOOL_CHANGE_POSITION = 90MM
Z_DRILL_DEPTH = -4.3MM
FEED_RATE_DRILLING = 40

                            

There is a 45 degrees rotation request for optimal board manufacturing. Thus CLOCKWISE_ROTATION_IN_DEG is set to 45. Cutting is requested here, so the Z_CUT_DEPTH option is also used. Other options has been mentioned in previous section.