Apoc and Neop4j incompatibility and How to solve it

Hello all,

I am pretty new to Neo4j and graph based softwares. I am using it for my master thesis. I ran into the following error.
Neo4j version being used: 3.5.15 (Neo4j Desktopm App)
According to the github, the version of apoc that is compatible with this Neo4j version is Apoc
However my Neo4j app only shows the apooc version in plugin even though I replaced the jar file of this version with Apoc jar files in plugins folder in DB and made changes in the conf file.

Can somebody givew me a detail step by step procedure of how to changew the apoc version in Neo4j? Then this would be available for anyone in the future having same problem.

Thank You very much