To upgrade from ChangeAuditor 5.6, 5.7, 5.8 or 5.9, you must first upgrade to ChangeAuditor 6.0, or to 6.5, then you can upgrade to Change Auditor 6.6. If you are upgrading from one of these 5.x versions, you will NOT require new Change Auditor 6.0 licenses.
Upgrade ChangeAuditor
To ensure a successful upgrade of Change Auditor, please upgrade the ChangeAuditor components in the following order:
• Step 1: Upgrade the Change Auditor Coordinator (and Database Schema)
• Step 2: Upgrade the Database Schema in Multiple Coordinator Environments
• Step 3: Upgrade the Change Auditor Client
• Step 4: Upgrade the Change Auditor Agents
Please refer to the Change Auditor Install Guide for the detail steps involve in upgrading Change Auditor successfully.
https://support.quest.com/technical-documents/Change%20Auditor/6.6/Installation%20Guide/?ParentProduct=604