Citrix Receiver 12.3 crashing on MacOS Sierra 10.12.1

Since upgrading to Sierra 10.12.1 on my MacBook Pro my Citrix Receiver 12.3 started crashing. Citrix support maintains this is an "Apple Issue", quite frankly I don't care who is at fault, I'm just looking for resolution to the problem...

Part of crash log follows:

Process: Citrix Viewer [71651]

Path: /Applications/Citrix Receiver.app/Contents/Helpers/Citrix Viewer.app/Contents/MacOS/Citrix Viewer

Identifier: com.citrix.XenAppViewer

Version: 12.3.0 (418199)

Code Type: X86 (Native)

Parent Process: ??? [1]

Responsible: Citrix Viewer [71651]

User ID: 829700659

Date/Time: 2016-11-14 08:22:32.958 +0200

OS Version: Mac OS X 10.12.1 (16B2555)

Report Version: 12

Anonymous UUID: E39662EE-7599-B8FC-B706-853276E89DFB

Sleep/Wake UUID: B806B268-D730-4C70-9D8A-A5DD9D5451AD

Time Awake Since Boot: 75000 seconds

Time Since Wake: 10000 seconds

System Integrity Protection: enabled

Crashed Thread: 0 1 Dispatch queue: com.apple.main-thread

Exception Type: EXC_BAD_ACCESS (SIGSEGV)

Exception Codes: KERN_INVALID_ADDRESS at 0x00000000e7ca37d1

Exception Note: EXC_CORPSE_NOTIFY