The leap to 14.3 is less about "new buttons" and more about "new intelligence":
Upgrading to SEP 14.3 provides several benefits, including: symantec endpoint protection upgrade 14.2 to 14.3
The management console must always be at a version equal to or higher than the clients. Download the Installer: Obtain the 14.3 installation files from the Broadcom Support Portal Run Setup.exe: The leap to 14
Deploy via your software distribution tool. symantec endpoint protection upgrade 14.2 to 14.3