Does not work at all like images, is useless

On IOS 10.11.1, only shows a single pane with email heading, does not have a right hand pane that shows the text, does not access either Yahoo Contacts or Apple Mail contacts, so it is useless. The email boxes do not show on a left hand pane, only shows if I click the three lines on above right. What I suspect is this app has not been updated to latest IOS, or there is some other major bug.

Clarkroe about MenuTab for Yahoo