Address books are stored in the Profile folder and they will have a .mab extension. Info on address books: * http://kb.mozillazine.org/Moving_address_books_between_profiles The two default address books, 'abook.mab' and 'history.mab' can be copy pasted from the old profile to the new profile, overwriting the empty default address books.. Other .mab files need to be exported and then imported. However, as you cannot export, you could use an addon extension to import them. MoreFunctionsforAddressBooks - addon * https://freeshell.de/~kaosmos/morecols-en.html download the xpi file to desktop or downloads folder. the download link is at the bottom of the page. '''How to Install addon''' * Tools > Addons OR Menu icon > Addons * click on gear wheel icon and select ; Install addon from file' * locate the xpi file you downloaded and click on Open * Restart Thunderbird at the prompt '''How to use addon to import mab files''' * click on 'Address Book' * Tools > MorefunctionforAddressBook > actions for address books > Import address book from mab file * Give the new address book a name and click on OK * locate the mab file in Profile and click on import/open. '''Where is the Thunderbird Profile folder?''' The AppData folder is folder is a hidden folder; to show hidden folders, open a Windows Explorer window and choose "Organize → Folder and Search Options → Folder Options → View (tab) → Show hidden files and folders". More info - make hidden files and folders visible: * http://kb.mozillazine.org/Show_hidden_files_and_folders Windows Vista, 7 and 8 store Profile name folder here; * C:\Users\Windows user name\AppData\Roaming\Thunderbird\Profiles\Profile name\

Thanks a lot for your help, everything is fine