TINKERPOP-1553 we deprecated store() in favor of the newly added aggregate(Scope,String) (using local for the Scope). Renaming the step classes of StoreStep and AggregateStep themselves was reserved for 3.5.0 so as not to create a breaking change. The renaming brings AggregateStep in line with other Scope oriented steps (e.g. MaxLocalStep and MaxGlobalStep). Providers should correct any traversal strategies that reference these steps on upgrade.