Thx for your reply.
Finally I drop all the tables and restore the database with the utility. It seems to work but not totally. For some albums, everything is restored. For some, nothing is restored. That's why I really need a utility to open the database backup file .zdb generated by Zenphoto !
Yeah it's a live site. I know I shouldn't run tests without having a full backup. But I didn't run any test. Just moving some albums to a sub-albums. For me, it was supposed to be a standard operation not destroying everything !
Thank you for your advice. I don't know how to use EXIF/IPTC data on my computer. Just how to read them.
I know the title of an album is totally independent of the name. The problem is that sometimes I use accent in the name and it's a big problem. That's why folder name and title are different !!