I can now confirm that the version in use when I wrote the OP was 4.2.24 and that I have now upgraded successfully to 4.2.26. However, the problem still remains, as I guess you may have expected.
Good luck resolving the flood. Apart from that I really enjoy using it and I would really like to be able to recommend it to my user base. I currently have 25,000 active users, although I don’t know how many of them use my product as I do, with a headless Mac Mini.
FYI, with my OP, I did check the box “Notify me of follow-up replies via e-mail”, but I wasn’t notified of your reply to me. I’ll see what happens with this one.