make sure the check for the eid-xor binary also works on Windows

    if "fer_file" in args.keys() or "ber_file" in args.keys():

        # assert that the eid-xor tool is there

        eid_xor_path = os.path.join(runner.config["utilPath"], "eid-xor")

        bin_ext=""

        if platform.system() == "Windows":

            bin_ext=".exe"

        eid_xor_path = os.path.join(runner.config["utilPath"], "".join(["eid-xor", bin_ext]))

        if not os.path.isfile(eid_xor_path):

            raise FileNotFoundError(f"Could not find {eid_xor_path} (needed for error pattern insertion)")