StackRegent 0.17.6
SpamAssassin as an optional mail component (spamd on 127.0.0.1:783, daily rule updates, built-in filter as fallback); Microsoft Defender shown correctly in Services and set up with database exclusions on install.
How to update: in the administrator panel, open Tools & Settings → Updates, click Check now, then Install. Websites, mail and DNS keep running while the panel updates. SHA-256 of the package: f04102ea53d7a77ffddaf368d67325d6740bf560138c19c74648b475fb674a34