I am new to the world of "live" photos, since my iPhone 6 did not support them. I have now got an iPhone X, and when I took it abroad to France, it adjusted the system time automatically. Great! Now .HEIC photos show the local time when the photo was taken - exactly as I want it.
Unfortunately, I left the 'Live' photos option on. For most pictures there is an associated .MOV file: clicking the shutter produces both IMG_0182.HEIC and IMG_0182.MOV. They're not hard to delete in the folder - simply re-sort by file type, and put them in the trash.
But some of them are interesting enough to keep. Unfortunately, these are offset by an hour, both in the Finder and in GraphicConvertor.

Is there anything GraphicConvertor can do to recognise this discrepancy, and fix it quickly? Or will I have to go through the files one-by-one?
Thanks.