Thanks for the reply but which of the two options I've given is "recommended"?
Here (https://help.eset.com/esmc_install/70/en-US/components_upgrade.html) it says "If you are using ERA Virtual Appliance, the recommended upgrade procedure is to pull the database to a new appliance to keep your OS up to date."
Many of the links in the documents contradict each other, for example the above is talking about migrating/upgrading from ERA to ESMC but the "upgrade" link takes me to a page which describes pulling the database from the old ESMC server (which I don't have; it's ERA).
I'm sure there must be many admins looking to migrate/upgrade from ERA 6.5 to ESMC 7.0 but I don't see a clear path to carry out the process.