Hello...

The history of these version apps is this:

iGO primo Nextgen 9.18.27.687519 (Update:Feb 7, 2017)
iGO primo Nextgen 9.18.27.681611 (Update:Dec 20, 2016)
iGO primo Nextgen 9.18.27.676280 (Update:Nov 9, 2016)
iGO primo Nextgen 9.18.27.658108 (Update:Jun 17, 2016)

the common thing that have all these apps, has removed GP services...

@Midnight Blues has again right about first crack...

i will try with x.x.x.519 and lets see...