OK, still no luck. Disabled my firewall then performed the command line purge and install, get the same result, no key is showing up in the Admin Control Center. I'll include some details seen from the diagnostic page.
System Information:
Version: Sentinel License Manager 18.0.1.55505
Computer Name: CR6TX1
OS Name: Windows 7 Enterprise
OS Version: Build 7601
Architecture: Intel64 Family 6 Model 44 Stepping 1
Additional Info: PlatformId: 00000002 version 6.1 Service Pack 1
Virtual Machine: Running on KVM
Protocols: IPv4, IPv6
Local IP Addresses: 192.168.1.25
TCP/UDP Port Used: 1947
Run-Time:
Run-time Installer: 7.41.56407.1
Run-time Package: 7.41
hardlock.sys: 3.87
fridge_lib: 1.8.55505
aksdf.sys: 1.51
aksfridge.sys: 1.74.56276 (1,0,0)
Local Sentinel Keys
This section only shows the headers (such as; # Location Vendor ID Key ID etc.), but the key information/details are all blank.