Wurde nur Thunderbird neu installiert oder das ganze System? Ist das Profil der alten Thunderbird Installation noch vorhanden? Windows, Linux oder macOS? https://www.thunderbird-mail.de/lexicon/entry/48-profilordner-wo-ist-er-zu-finden/

Hello, I have reinstalled Mozilla Thunderbird on my computer due to a glitch, but unfortunately my entire address book is gone. Is it possible to restore this address book? And how ? best regards Francoise

If you have another profile besides the current one or a profile backup, search for abook.sqlite and history.sqlite, the two default address books. Copy them into the active profile, with TB closed. Help/Troubleshooting Info, Profile Folder, Open Folder, to open in File Explorer. Go up one level to Profiles to see if there are other profiles.