Does softwareUpdate work?

I see there is a setting that can be added into a local.conf file which seems to relate to software updates. I’ve created a local.conf file with the contents of:

{"settings": {"softwareUpdate": "apply"}}

Running this:

`zerotier-cli info -j

confirms the setting is accepted:

 "secondaryPort": 33305,
   "softwareUpdate": "apply",
   "softwareUpdateChannel": "release",

The source code seems to indicate a 10 minute interval between checks for updates (if my maths is correct), but I am not seeing an update occur. The version on the machine is 1.14.1 with the latest version, at time of writing being 1.14.2.

Am I doing this correctly? Is this implemented?