I have just upgraded xubuntu to 24.04, and am now missing all folders. Messages are available on searching, so all is not lost. Can send and receive OK. I suspect "snap". Looking at my file map, I see that I have Tbird and snap at the same level, and also "Thunderbird_backup_profile.zip". A user with snap-related problems on here was advised thus: "UDP: Remove thunderbird in snap. Install over apt. All works perfect. DO NOT USE install thunderbird in snap!" OK, so what can I do now, please? Roy