How do I get messages from a single email account in thunderbird supernova?

Previously I could hit a little arrow on the download messages button that showed a list of my email addresses, and then I'd select one and get the messages for it. Now there is a button to download all messages. There is also the same button that appears when you highlight an email address, but clicking it downloads messages from all the email addresses on that server, not just the email address I selected. How do I get messages for one single email address, regardless if I have several email addresses from the same server? I've tried customizing the toolbar but I don't see anything relevant.