Currently I use ZA free version 8.0.065.00 an two computers. OS XP SP3

Is there any need or recommendation to upgrade to new free ZA Version 9?

As I understand the new features are Win7 support and a new explorer toolbar that I do not need.

I had difficulties on both computer when I tried to upgrade to the last version ZA free 8.0.298. On both computers the Windows Security center did not recognize ZA free.

Because I am quite content with the version installed I`d like to keep it.

Thanks for advice.