I installed the APK successfully, but the APP did not work either because the Tablet is not rooted or because the 4.4 Android version is too low. I don't know, so I deleted it. Even the Apps that I installed that do work , I always close out the MaxiSys App before opening any App I installed, and make sure they are closed out before opening MaxiSys App .
https://www.youtube.com/watch?v=uqpNPqIXbsQ