def __init__(self, filename=None):
        self.filename = None
        if filename:
            self.load(filename)
def on_fuzzing_range_end_changed(self, value: int):
        self.ui.sBAddRangeStart.setMaximum(value - 1)
        self.ui.sBAddRangeStep.setMaximum(value - self.ui.sBAddRangeStart.value())