I installed ZA Free Firewall but it says I have the Antivirus + Firewall installed. It says it needs updated but will not update.

I have used the ZA Uninstaller and reinstalled the latest version of the ZA Firewall only, but it still says I have the firewall/antivirus version and still says the "security update is overdue".

How do I fix this?

Windows 7 Home Premium.
ZA version