Stopped working without warning

Was working fine for years, but now suddenly will not open. This occurred after the May 28 update. Using iphone 5s with latest ios. Please help. I love this app. I teach photoshop, and show my students comparisons against the app.

Just received the "fix" update. Everything is perfect again. Thanks for the quick response!

R Riggs about 360 Panorama, v4.4.2