Do you know offhand what version(s) that appears in? I can't find such an option in either v3.194, which is, I believe the latest PPA version, or in whatever version came on last month's Boot-Repair LiveCD image.
Note that I'm assuming that, like the other EFI options, the SecureBoot option appears if it detects an EFI disk partition, regardless of what your BIOS settings may be. (I only have one machine at my present location that features SecureBoot, so I can't test that assumption.)
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