Hi there. I recently updated my Mozilla thunderbird email to the latest version 102.12.0 (32-bit). Now all my Mozilla thunderbird calendar entries have disappeared. How do I get these entries back please? I've had a look on the support pages and found this article: Lightning disappears after a Thunderbird update (release and beta versions) This may happen if the update of the add-on is stuck. Don't worry about your calendar data, it is left untouched and will be available again if you follow these steps to restore Lightning: Go to the Advanced section of Thunderbird Settings and click on Config Editor... Copy or start typing extensions.installedDistroAddon.{e2fda1a4-762b-4020-b5ad-a41df1933103} into the search box When extensions.installedDistroAddon... is listed in the preferences list, right-click on it and choose Reset from the context menu - the preference now isn't bold anymore and its value is empty Close the editor, leave the Thunderbird options, open Thunderbird's add-ons manager and switch to the list of installed extensions If Lightning is listed there, click on Remove to the right of the list item Restart Thunderbird After Thunderbird has been relaunched, Lightning will be back and you will have access to your calendar data. However I don't have an "advanced section" of Thunderbird settings or a "Config Editor" section. Any help you can give me will be greatly appreciated. Kind regards Trevor