It looks like there are several different pages describing the update process and I’m not sure which ones in particular apply in this case.  I’ve got a cluster with 6 hosts, 3 of which can run the hosted engine.
Would this be the correct procedure? https://www.ovirt.org/documentation/how-to/hosted-engine/#upgrade-hosted-engine

And for Step 2 in that procedure, would this cover it?

# yum install http://resources.ovirt.org/pub/yum-repo/ovirt-release42.rpm
# yum update “ovirt-*-setup*”
# engine-setup

And for Step 4 in that procedure, can that be done in the GUI alone or does yum need to be run from the CLI?

Thanks