Edit this value:

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\ICA Client\Engine\Configuration\Advanced\Modules\ICA 3.0]

"VirtualDriverEx"="HDX RealTime Media Engine, SOCKSProxyPlugin, UDPGatewayPlugin"

In my case I have deleted all values and Citrix start working for me again after the latest update.