The protection, apart from script blocking capability, PUSH updates, and a few other handy features, is the same.
If your registration is out of date, and you haven't been able to get database updates as a result, your protection is increasingly limited.
If your registration has expired, get a new one. Now.
If you are worried about the differences between Home and Pro versions, look at the
comparison chart.cinchez, if you are going to promote fear, please offer some basis for it.