The only possible reason for this is your antivirus or firewall blocking the installation of the updated installer.
- Turn off the firewall
- Configure the antivirus to be sure the whole Addon Manager folder is added to the antivirus Exclusions
- Run the Live Update again, which should update itself and show the current version, which includes KIAH.
If that still doesn't work, try the Offline installer which can be found on the top of the GSX Pro Support page of the forum.