Update not working

Well, you're in luck, as the Astaro firewall is one of our enterprise products :)  The issue you're experiencing is due to the firewall being configured to block downloads of installer packages (this is enabled by default), and the file you're downloading is in fact an installer package.  You can contact your listed customer support for your Astaro product if you need help reconfiguring the firewall settings.  They can also provide feedback to the SAV Mac dev team, so if you treat this as a firewall issue instead of an AV issue, you'll actually get access to our support department instead of just this community forum.

I presume this is for using a personal laptop behind a corporate firewall, but I should mention that SAV Mac HE is a home-use product, and we have an enterprise version with support for non-home-use such as business, educational, non-profit, etc. (you might even get a deal on it should you need it, since you're already a firewall customer).

Well, you're in luck, as the Astaro firewall is one of our enterprise products :)  The issue you're experiencing is due to the firewall being configured to block downloads of installer packages (this is enabled by default), and the file you're downloading is in fact an installer package.  You can contact your listed customer support for your Astaro product if you need help reconfiguring the firewall settings.  They can also provide feedback to the SAV Mac dev team, so if you treat this as a firewall issue instead of an AV issue, you'll actually get access to our support department instead of just this community forum.

I presume this is for using a personal laptop behind a corporate firewall, but I should mention that SAV Mac HE is a home-use product, and we have an enterprise version with support for non-home-use such as business, educational, non-profit, etc. (you might even get a deal on it should you need it, since you're already a firewall customer).