Update (24-08-15): This issue has since been resolved.
We are currently experiencing issues providing our latest updates for Spybot 1.6 and sbNet Business Edition users. We are working on this around the clock and expect to have this problem fixed soon.
Users of Spybot 2.0 and above, or the Corporate or Technician Business Editions, should not experience any issues regarding updates.
We apologise for any inconvenience this issue has caused.