Now totally useless

Ws asked to install an update. Now, all I get is a white screen. Tried uninstalling, re-installing, shutting down computer, re-starting, over and over agan. Nothing works, still just a white screen when I try to open it. I am using El Capitan. Deleting this and going back to the browser. Very disappointed becaue I really liked this app.

cmurf1960 about Kiwi for Gmail Lite, v1.9