I know, which is why I clearly stated to remember to use the file with the 2019 suffix as the user has a 2019 TV.Just a word of warning that may apply to you so it may be worth considering. @mrtickleuk tried the DV Config only trick and allowed CalMAN to upload it to the the TV. DO NOT DO THIS. When this happened he was not able to revert to factory DV Config after the fact using the USB trick. Now, it must be said that his TV is 2018 LG OLED, while ours are 2019 models. When I did this I was able to fully restore factory DV Config by resetting the picture mode from the user menu and others have been able to too. But I recall at least one person (it may have been you actually) that couldn't.
So, I would advise that when it comes to the DV Config file creation, when it generates, store it to a known location (eg Desktop), copy it to USB and load it to the TV that way (remembering to use the file with the 2019 suffix). This way you are sure that you will be able to return to factory DV Config without having to Factory Reset again.
Probably because 2018 and 2019 have different format DV configuration files. They are not interchangeable.
But that wasn’t the point. Some are finding that factory DV Config cannot be restored if you let a newly generated one be loaded via CalMAN, whereas if you load it manually via USB you can always revert it back to factory.
It is not a criticism, or an argument or anything like that, it’s an observation and a potential workaround/fix.