Probably Solution 2, Re-create the preference file. Also known as resetting the preference file. The preference file can get corrupted leading to buggy behavior, A corrupt preference file will survive normal uninstalls, reinstalls, updates, upgrades. In addition to the various preference settings, the preference file keeps various settings and states, etc. Note that resetting the preference file will revert many settings to defaults.
I just reformatted my hard disk and reinstalled Mac OS. which the program lightroom-classic this new version It's a brand new installation, no lightroom-classic program. old version and old data in my device at all
Therefore, it puzzled me that Where do I go to reset my defaults? in my program please give me advice Thank you very much for all the answers