Neo4j

Thank you I appreciate your advice and follow up . will go with this direct way 

Thank you David, but I did the same from 3.5 to 4.5 and still I get errors "database is unavailable"

Thank you David, I did the same upgrade from 3.5 enterprise edition to 4.4 enterprise edition, but it doesn't work and I get the following error : Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.dbms.database.DefaultSys...