This is so frustrating! Thunderbird was working fine til late yesterday afternoon, then a message appeared onscreen (with a tickbox for Gandhi.net in it), asking if I wanted to start a new account. I didn't want a new account, but I couldn't get past the message to get Thunderbird to open as usual. So I left it til this morning. I've spent ages today trying to sort this out, with no luck whatsoever retrieving past emails or addressbook.