Having read the OP that the D patch had been pulled, I downloaded from the Kaspersky website and reinstalled KAV.
It showed the C version, but after rebooting, I had the D version.
I tried connecting with the latest Eddie and Firefox and NO GO.
Uninstalled KAV again and everything back to normal.
Hope this stops others from wasting time like I did.
It's working for other users trev.
There is another workaround if you've had Patch D forced upon you.
- Right click on the Kaspersky icon and exit the program
- Then load Eddie and wait until you're connected
- Now re-load Kaspersky.
I've spent a substantial amount of time analysing the crash dump in Visual Studio and it's 100% a problem with Kaspersky. I have sent a PGP message to their development team to let them know of the problem.
It's quite an easy fix for Kasperksy to implement although they have suggested that it may not be fixed until Kaspersky 2018 (later this year). They have broken compatibility with OpenVPN. There is a fix for OpenVPN but I have neither the time nor inclination to write a patch for OpenVPN when the issue has been caused by an improper anti-virus implementation.
Kaspersky is so effective (they are 1 of the top 2 AVs) because it puts deep hooks into the operating system to prevent/detect viruses and malware early. I'd suggest people continue using it (Windows Defender alone is not sufficient) and await a patch. It's inconvenient I know.
Alternatively Sophos provide commercial-grade protection for free for home users. I've not tested their endpoint software with AirVPN but I successfully use their UTM without problem. You can download it here.