I tried to upgrade from 7.0462 to 7.0470 doing a simple upgrade but this caused the computer to get almost frozen after rebooting ... (100 % CPU activity...) I had to uninstall with the /clean option in Safe mode and rempove manually all traces of ZA in the registry and Windows folders. After that, installing version 7.0470 was uneventful ... but I had to recreate all my options and firewall rules...