With the release of vSphere 6.0 and a recent update for the 5.5 VMware Tools on May 8th 2015 (9.4.12 build 2627939), VMware also changed the Windows VMware Tools installer slightly by renaming some vShield-related components:
VMware ESXi 5.5, Patch ESXi550-201505402-BG: Updates tools-light
The vShield Endpoint drivers are renamed as Guest Introspection Drivers and two of these drivers, NSX File Introspection Driver (vsepflt.sys) and NSX Network Introspection Driver (vnetflt.sys), can be installed separately now. This allows you to install the file driver without installing the network driver.
If you’ve been using custom automated installations of the VMware Tools like me then you might have to adjust the installer command for newer tools versions.