Even now, its not enabled for me, facing the same issue
I followed the installation steps for APOC,
Downloaded APOC jar from this link (version: apoc-4.2.0.0-all.jar) and placed it in plugins folder
Modify the Neo4j Configuration file, present in the location: <Neo4j Path>\conf\neo4j.conf
Uncomment dbms.directories.plugins=plugins #allows Neo4j to load this plugins directory to server
Uncomment and modify as following
dbms.security.procedures.unrestricted=apoc.*
dbms.security.procedures.whitelist=apoc.*,apoc.coll.*,apoc.load.*
#loads unrestricted and white-listed procedures/ plugins to the server
#Useful for reading and writing data from and to files respectively
Restart the server
but couldn't start the Neo4j server and getting an error saying that
APOC couln't set a URLStreamHandlerFactory since some other tool already did this (e.g. tomcat). This means you cannot use s3:// or hdfs:// style URLs in APOC. This is caused by a limitation of the JVM which we cannot fix.