Upgrade Change Auditor from 7.x to 7.6.3
Upgrade from Change Auditor v7.x to v7.6.3 doesn't require a new license. It is suggested to go through all the links mentioned under the Release Notes and Installation guide on this article.
To get familiar with the upgrade process, it is recommended to perform the upgrade in a demo environment before doing it in production environment.
Change Auditor 7.6.3 - Release Notes:
Change Auditor 7.6.3 - Installation Guide:
Change Auditor 7.6.3 - Installer Package: