@Wayne_Woodcock we don’t post APK files for 1.7.x version anywhere. If your tablet has Android version 4.2 or later you should use either Amazon or Google Play app store to install app updates.
The 1.7.x app version does NOT work on devices with Android version before 4.2. See more details about PractiScore app for Android at PractiScore scoring app for Android
See info on Amazon’s tablets Fire OS at Fire OS - Wikipedia