When the last comment issue was fixed, delete got broken for files with no comments, doh, so just manually delete files no longer in the photoplog_fileuploads table, and upgrade to v.1.0.4.4.
Code:
# run the following query via phpMyAdmin and view the list of file names
SELECT filename FROM photoplog_fileuploads;
# if a file in the PhotoPlog images directory is not on the list, then
# delete it from the PhotoPlog images directory via FTP
# DO NOT DELETE ANYTHING FROM THE photoplog_fileuploads TABLE