Google is updating chrome regularly so you probably got a popup when Mcafee noted the program had changed. You can unblock it in Email and web protection / Firewall / Internet connections for programs.
Ok reread your post and I see your subscription is ended.
The faq seems to i9mply you can change settings just not update or upgrade
Will my subscription still work if it has expired?
Summary: Expired subscriptions will not receive updates and therefore will not protect you from new threats.
When your subscription expires, you will no longer receive updates. Without the latest updates and virus definition files, you will not be protected against new threats. This includes Potentially Unwanted Programs (adware and spyware), viruses, and spam. Hundreds of new viruses are discovered each month, so it is important to keep your protection up to date.
When your subscription expires, you will no longer be able to download new updates and virus definition files. You will still be able to use the product, but you will not be protected from threats newer than the last update before it expired. If your boxed or download-only product has expired or will expire soon, McAfee strongly recommends that you renew the license at http://us.mcafee.com/root/upgradecenter.asp.
If this is the case ie you cannot access the seyyings let me know and I will check further
Tony is in Australia so is asleep as I type this. Yes you should be able to change settings or so I believe, however having never used an expired McAfee product recently I can't guarantee that and would not be surprised if the product locks itself after a time which would be logical as it is the license to use the product that is purchased when you buy, not the product itself. The software is useless as it is anyway and provides little or no protection in an expired state so I suggest you uninstall it in the normal manner via Control Panel/Programs/Uninstall a Program (Add or Remove Programs in XP). Then run the MCPR cleanup tool linked under Useful Links at the top of this page and reboot immediately.
You can still use SiteAdvisor browser protection which is free, downloadable seperately from http://www.siteadvisor.com .
I'm assuming you are using some other kind of protection in the meanwhile.
Just as an afterthought to this thread, I noticed a long time back that whenever Chrome updates to a new version there is a pop-up saying "Chrome.exe is trying to access the internet, do you want to allow it?". That's because each update is actually a new downloaded version, as you'll see if you go into the folder structure to look for chrome.exe : there you will see the current version and the previous one (presumably in case you have to roll back if there is a major problem with compatibility). Which is I suppose why the Chrome update process takes so long to complete.