batch update to existing photos

Yes.
FTP the to your depot ( …/wp-content/wppa-depot/{yourloginname}/ with Filezilla or the like.
Open the Photo Albums -> Import Photos admin page.
Tick:
[V] Remove from depot after successful import.
[V] Remove from depot after failed import.
[V] Update existing photos
[V] Do not create duplicates
Press the Start Ajax Import button.
You even do not need to know what album they belong.

ok, but, the following options do not exist:

[V] Remove from depot after failed import.
[V] Update existing photos
[V] Do not create duplicates

the only one that exists is “check/uncheck all” and “Delete after import”

nevermind, found it.

ok it updated the main image files but not the thumbnail images… do i need to remake thumbs on the system after this? OR should i have ticked “zoom preview” when i was importing?

The thumbnails are remade also by the udate process.

it didn’t update the thumbnail displays. So, what should i do?

see here, on my page they are not updated, still show the old photos, you can see they are all supposed to fill the square, so i udpated the photos in this gallery to be cropped correctly, but stilol thumb shows old version….
https://www.oisheichildrensmosaic.org/super-view-photos/wppaspec/oc1/po1/cv0/pg7/ab68

No problem. Run Table VIII-A4: Regenerate (thumbnails).
However, i will get into this, it should do it auto when updating photos.

Ha Ha, i found it. The process created the new thumbnail from the old sourcefile before copying the new file to the image source directory. Will be fixed in the next version. Thanx for the report.