Yep, it makes little sense to me why something which is so critical to always be there ready and waiting no longer runs as a service, expect there is a good reason (perhaps Microsoft has changed something).
Same goes for V-Ray Standalone, I remembered after writing the above we still need to use NSSM to setup Standalone to run as a service.
Hope the below helps 
License Server
For the License Server, the setup was very easy:
Create:
C:\nssm
Copy into above:
nssm.exe (available from NSSM - the Non-Sucking Service Manager)
Open Command Prompt as Admin.
Change DIR to:
C:\nssm
Run commands:
nssm.exe install VRayLicenseServer “C:\Program Files\Chaos Group\VRLService\OLS\vrol.exe”
nssm.exe install VRayLicenseServerSupervisor “C:\Program Files\Chaos Group\VRLService\OLS\vrlsupervisor.exe”
Open Services (services.msc)
Stop the 2 processes started on login - seen in Task Manager Processes
Start the 2 services just created
Standalone
Very similar but you need to change the user account the service runs as if like us V-Ray Standalone needs to access assets on your network e.g. a file server, otherwise it will default to the machine’s SYSTEM account. Easy to do this via the NSSM GUI.
Open Command Prompt as Admin.
Change DIR to:
cd C:\nssm
Run command:
nssm.exe install VRayStandalone “C:\Program Files\Chaos Group\V-Ray\Standalone for x64\bin\vray.exe” -server
Open Services (services.msc)
Start the 1 service just created
NSSM GUI
You can also do various using the NSSM GUI:
To install:
Open Command Prompt as Admin.
Change DIR to:
cd C:\nssm
Run command:
nssm install
To edit:
Open Command Prompt as Admin.
Change DIR to:
cd C:\nssm
Run command:
nssm edit
NB: you can edit the service here including file path and arguments.
To remove:
Open Command Prompt as Admin.
Change DIR to:
cd C:\nssm
Run command:
nssm remove