So far the versions of 1.17.2 and 1.17.3 provided by gztr567 (thank you) are the only ones that have installed correctly over previous TomTom Go versions under Android 6.01 on my Nexus 7 and Moto G3. So for me, the original and patched versions released by DFoX won't install over previous version of TomTom Go on my devices.

Cheers, Ian