Since the last update, thunderbird keeps threading mails! This function has rendered Thunderbird now fully unusuable to me! I do not want this function, nor do I see any sense in it. I am receiving thousands of mails per day and this function makes it impossible to work with Thunderbird. So I want to disable it - however, there does not seem to be any setting that enables me to disable this function! This function which probably got thought up by someone who cannot remember word by word what he wrote to whom a year or two or five years ago is driving me absolutely mad. I still can remember whom I wrote what even 10 years ago - and this with up to hundred mails going out per day... so where is the difficulty in getting your brain to work? Please let me know who I can disable this threading function that makes use of Thunderbird impossible!