This fixes bugs in 3.6.0-rc.2 and adds minor functionality improvements. The change list is https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x-RC#reprapfirmware-360-rc3.
The files provided here are for users running Duets in standalone mode. Please update the relevant IAP files for your Duet as well as the main firmware files.
If you are running a Duet in SBC mode, please update form the package server as usual.