Just installed Neo4J desktop 4.1.0. When I go to install the Apoc plugin there is no option to install it.
I am not sure if it is related but our overzealous networks manager has blocked GitHub as a 'security risk'!
I downloaded the Apoc jar on another machine and copied it across. Neo4j is installed on D:\Neo4jDesktop on my machine so I created a plugins folder one level down (which I thought was the right location) and put the jar in there but still no joy!
Look for a folder that looks something like this inside, it's probably not Neo4jDesktop where the actual database instance lives. Try a search on your machine for 'neo4j.cer' and see if that doesn't give you a different location. I have an Enterprise version installed, but the inside of your directory will look similar.
When you create a database, in the database window you will see three small circles at right top corner. Click on it and select Manage. On the next screen select the plugin tab and APOC and GDS. Click on install one after the other.