Upgrading your installation Path structure and log name changesAs of release 2019.1, we have flattened the folder structure at the platform level. We have also changed the path to and names of some log files.Moving transactional data - upgrades onlyAs of release 2019.1, we are moving transactional audit log and flow history data from Neo4j to Elasticsearch to improve the maintenance of and access to this data.Migrating your search indexesIf you are upgrading to release 2019.1 from release 2018.2, your Elasticsearch search indexes will migrate to release 2019.1 during the upgrade process.