Please provide your Plugin Environment, (see guidance here) which will include versions of all the add-ons, Premier , Exp etc.
Premier is version 4.4.03 , you should be using Experience add on as well if you are current on your subscription. (it will replace, deactivate the Enhanced Search, Enhanced Results etc, it will update and not re-set) There is also a new release 4.4.35 for people who are using old versions of php
With the new format the clusters checkbox is not where you may have seen it before.
It is under Experience/Map/and about half way down a section called Premier. Your back end under Map should look like this if you have EXP 4.4.xx and Premier 4.4.01 or higher