Apps purchased from Amazon Underground not working on Galaxy S 5.

[AC Question]

We have a Samsung Galaxy S 5 and have been using Amazon Underground for quite a few apps. Around the time of a system upgrade (slightly before), apps that were purchased from Amazon App Store would not open. We have tried uninstalling and reinstalling and restarting the phone but have had no success.

 

[B. Diddy]

Welcome to Android Central! Do you know if those apps were moved to SD? When you say that you installed and reinstalled, are you referring to those apps, or the Amazon Underground app itself?