Hello, After the last update 143.1.0 a large part of one of a sub folder in my local folders disappeared. I restored my recent backup but still the part of the folder is missing. I used a copy of my profiles made on my laptop with no results. I completely uninstalled Thunderbird then copied my backup with no luck. Finally, I had to make a full image restore to get Thunderbird back to where it was before 143.1.0 I updated to 144.0 with no change. Each time I open TBird, it asked me to install the 143.1.0 update and if I do then the same happens, a big part of one of my local folders subfolders disappears. Strangely, on my laptop that is basicly a duplicate of my PC thunderbird everything is ok with the last 143.1.0 update. What is in the 143.1.0 update to cause these problems, is there a command to reject long file names.  ? Has anyone experienced this problem otherwise I will be stuck with update # 143.1.0 for years Thank you Douglas Noades