Dynamics GP Upgrading from a version to its R2 version

SCENARIO:
You need to upgrade from GP2015 to GP2015R2 for example.
You have downloaded the media and on running the file you are only allowed to add/remove features or repair.

WHAT TO DO:
Run the file in the Updates folder and this will get you on the new release. Then run utilities as admin so the tables can be updated.

REASON:
You are already on the main version of the software and its just a patch/service pack that needs to be added.