Crashes - Display Weirdness

I run GPredict on a few Raspberry Pi 3 with no problems - except my Pi with the Sense Hat. (That is about the only difference between SD cards I can think of.)

GPredict starts to run, background image there - but immediately freezes. WITH a small, rectangular image in the top-left corner: a mini-screen of the passes. No
mouse clicks do anything … and the system will tell me an app is unresponsive.

Any ideas on what I have done wrong? I uninstalled and reinstalled already.