"SG's directions" being …. ? (SG Photography) Link?
Does "starting a new Plan and a new backup" just overwrite the existing plan?
I have no idea.
Could be a safeguard: you are prevented from deleting a backup plan unless there are multiple plans.
This is a possibility. I could try to put in a second Plan
I.e., there is always some (at least one) backup plan in place? Any documentation?
PictureEcho:
https://pictureecho.com/
No immediate response or suggestions with respect to the duplicates.
I couldn't tell whether or not PictureEcho was working. After checking Delete file and Delete Plan, and then Start, there was a dropdown that said deletion was starting, but after that, there was no indication that anything was happening. Nonetheless, I let it "run" for about 10 minutes. However, when I checked the size of the backup, it had been reduced by about 20%. So, obviously, something was working although there was no indication of what was happening.
However, before you do anything, ensure that you have backups that are verified to be recoverable and readable.
And nowhere near the drives and folders that you are trying to purge of duplicate photos. Preferably the backups are offline and disconnected. With copies both on and off site.
If there is some software bug or user error, all photo's could be lost.