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You could, but please be aware that several people have had issues with those official LG flashers.

You will also be unable to extract the 1.05 firmware from the official LG flasher (it won't work if you do a firmware dump of a BU40N with 1.05 firmware, either) : the 1.05 firmware is encrypted ...

I was able to successfully flash my drive (BU40N) to 1.03MK and everything works. However, I received an error at the end, but I clicked too quickly and did not save it, and the Firmware_Dumps were not created. If I need to revert to 1.05 for any reason, should I just reflash using the official ...