To export a preset, in the Develop Presets panel, right-click the preset and do Show In Finder / Explorer. Copy the .xmp file.
To import a preset, place a copy of the .xmp file in that same folder. Or click the "+" on the top-right of the Presets panel and do Import Presets.
I'll try this
Hey John. I don't know if you will know the answer, but suddenly, when I do the right-click on the presets, the options that you mentioned before they just disappeared. The program only gives me 2 option: reset the setting or add the preset to favourite. I don't know with folder should I change or something.
This bug (or a similar one) was fixed in LR 7.5: Lightroom Classic: Presets - 'Update with Current Settings Option' replaced with only 'Apply on Import | Photoshop Famil…
Do Help > System Info to verify you're running LR 7.5. If not, do Help > Updates.
if that still doesn't help, copy the first ten lines from Help > System Info and post them here.