I use Zonealarm Pro, yesterday Xolox was working fine, but when I restarted today, it came up with 'version has expired'. It let me carry on anyway after clicking OK. I've read some reports of not upgrading to 1.13 and turning off automatic install of new versions. I've always had automatically install newer version unchecked. So how do I block http://www.xolox.nl in my firewall? Or what's the key to keeping it work, it seems to be working fine at the moment?