Finally an update, the last update was on April 2, 2017 D:ZoneAlarm Version 15.2.053.17581
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Improved: New and improved AV engine
Improved: Integration with Windows Defender Security Center
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One question from me: What is the new engine? Still Kaspersky?
The changelog with:
*Improved: New and improved AV engine
*Improved: Integration with Windows Defender Security Center
is from April 2, 2017.
The new update (January 5):
* Improved: Compatibility with Microsoft Meltdown/Spectre security updates.
That is, it is still the mechanism of Kaspersky.