The delete button is not deleting the selected messages. I have to restart Thunderbird to get it to work and it only functions a few times and then stops. At times you have to hold it down for a few seconds before thunderbird realizes you actually pressed it. I have tried deleting the trash folder as a previous link suggested and it only worked for a few minutes and wasback to its non functional behaviour Selecting an individual message and performing "right-click and delete" will work but even the delete key in the computer is not being recognized. I have version 102.9.0 running on Windows 10 Pro