Good morning, Jeff:
If it were me, I don't think I would update the BIOS if the notebook is running fine on W10 v1803.
Intel Management Engine Interface Driver...should be installed regardless of Windows version.
Orbit version to be installed on the PC:
ftp://ftp.hp.com/pub/softpaq/sp80501-81000/sp80951.exe
Orbit for Apple:
https://itunes.apple.com/us/app/hp-orbit/id1140275542
I don't know if Orbit has ongoing support or updates.
Methinks not, since the app was discontinued from the Google Play Store and the app did not come with your PC.