I am running Windows Live Mail (WLM) on Windows 10 and trying - but failing - to migrate my message store to Thunderbird. I have vast numbers of WLM messages stored in a structure of Local Folders which I wish to retain. I would prefer if possible to import the folders structure into Thunderbird rather than take the very long (and frequently failing) process of exporting all the WLM messages (into what format?). I installed Thunderbird a few months ago and added the ImportExportTools NG add-on. However the 'Import from folder' option was always greyed-out for some reason. Having started to test this again I updated Thunderbird, but now have Ver 102 for which there is no updated NG tool :-( Various web sources suggest to download an earlier version of Thunderbird (eg 91) from the web - but where??? I can't find anything to download other than the latest version. I've used Thunderbird in the past and want to use it again, but having read every help info and thread that I can find about the migration problem, I've yet to find a solution which actually works. Can anyone help please? I can't simply abandon about 10 years of mail messages, but I'm moving to a new Windows 11 PC in due course so I want to get off WLM first. Thanks!