On Tuesday, May 29th, 2018 Apigee released a new version of Apigee Edge for Private Cloud - Version 4.18.05.
Version 4.18.05 includes new features and bug fixes, see Apigee Edge Release Notes for the details: https://docs.apigee.com/release/notes/41805-edge-private-cloud-release-notes
You can read and download the documentation from the Apigee website: https://docs.apigee.com/private-cloud/v4.18.05/overview
The documentation describes how you can download and install the software; downloading the software requires credentials - your FTP credentials will also work and if you don't have, or don't remember, then contact Apigee support.
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