I found section 2.7 Turning off all security features in Client Security 14.00 user manual pdf document.
But can not find this feature in the main view of the product. Does Client Security 14.00 have this feature?
Yes, CS 14 have it, but it's disabled (unvisible) by default. You need to enable it in Policy Manager Console > Settings (Advanced view) > F-Secure Management Agent > Settings > User interface > Allow user to unload products.