No joy here.
My early LS-10 is firmware v1.04 (never updated IIRC). I just tried to use the OM Systems OM DVR Updater (Mac). The app installed, but but said this function is not available for the device, or some such, when I tried it with the LS-10 connected.
A pity, I found an old thread on the forum that mentioned everyone getting v1.10 but, of course those links don't work anymore. I suspect Olympus dropped a lot of balls when they split up. Even if someone kept the old updating software, you might need a vintage computer to run it.
I did not want to try using the Japanese site.