Does this AV use Kaspersky extended database or standard one? Also do the update AV engine as well or just definitions?
Standard. Engine upgrades are done via the updater, but only to a certain extent, it will not be 100% as effective as Kaspersky 5.0 or the soon to be released 6.0.
CyberScrub AV uses standard database of KAV. It does get updates for the core malware detection engine, but the program/front-end engine itself remains at version 4.5 for the time being.