From what I understand here, Renault will not commit to an official upgrade because they will not be able to offer Car Play for the car, which only OFFICIAL V3 and I believe V7 can offer. The issue with mine, and possibly yours, is the Hardware can't drive the Car Play hence no official release specific for the Kadjar.
The unofficial release is actually the offical version for the Megane hence there is a DEBUG process at the end of the update to realign the reversing camera, if fitted.
If you were able to get a car manufactured after, I think March 17, you have more chance of getting an official version.
2016 Black 1.2 TCE Signature Nav S Manual Petrol Bose with Tech Pack and Drop Tow Bar
Running Rlink 2 Version: 184.108.40.2060 Boot 4992
Map Version: mappackage_tt_feu_mid_2018_06