There is an attachment on the lower side of the left column in mailbox 126. Click Open to display all attachments of all emails, so some attachments will also have duplicates. You can either click Select All or click each attachment in turn and then download it, so QQ can do the same.
You can find the tool in the browser. There is a view download under the tool. After you open it, you can download something. There is an option below to set the way to download something