iOS Update causes Owncloud app to fail on iPhone 6plus

I updated my iPhone app last night to version 3.7.0 and now the app won't run correctly on my iPhone 6plus. The app is running in background as it's there if I double click the home button; but it won't display correctly on the screen. I believe Owncloud have failed to test the app on the screen geometry of an iPhone 6plus device. Is anyone else seeing this problem? I've been using Owncloud successfully for a while on the 6plus until this update. My friend says the update works fine on his iPhone SE. I'm new to this group - hope I've reported this in a suitable format. Thanks, Philip.