After update Veeam B&R with update 4, the version of backup console wasn't show 9.5.4.2615 but 9.5.0.1922.
the Backup entreprise was the right version 9.5.4..2615
The version of the console should be 9.5.4.2399 (RTM) or 9.5.4.2615 (GA). If yours does not match probably a reboot is required or something went wrong during the upgrade. If second - please reach out to our support team for investigation and do not forget to post your support case ID.