Well, I figured out how to remove the offending content myself, by deleting the appropriate files in ~/.mozilla-profiles/thunderbird/wpe6rtvh.default/Mail/News & Blogs (in case anyone ever has the same problem). Cheers.
Well, I figured out how to remove the offending content myself, by deleting the appropriate files in ~/.mozilla- profiles/ thunderbird/ wpe6rtvh. default/ Mail/News & Blogs (in case anyone ever has the same problem). Cheers.