I have a laptop that updated itself and is now updated to the latest version of Thunderbird. Desktop computer is still on v.115. I have the Local Folders on the laptop set to use a shared folder on the desktop and locally store incoming emails on the laptop. I use the shared folder for archiving emails on the desktop. So LaptopMail is stored on D:\LocalMail on the laptop and the Local Folders is set to store files on the desktop through the private local network on a shared folder (D:\Mail-Common on the desktop hard drive) Up until today this worked almost flawlessly. When things do go sideways on an update (which happens with thunderbird more than I like) I ususally search for an answer first. Normally, I find an answer that works. The problem is exactly as was in this post [ https://support.mozilla.org/en-US/questions/1512216#search ] The fix however didn't work for me. I cannot directly edit the Local Directory path either. The browse button still works though. Currently, D:\Mail-Common is mapped to the "N:" drive and all that is in the Local Directory path in the Local Folders settings is N: Any more suggestions are more than welcome