The reply I got back stated it was okay.
You should just need to register once and then once you have the installeryou can install on all your machines.
If you also consider upgrading to the full version please contact your localreseller as they may have an educational discount to offer you.
I hope this helps!
Dan MoranApplication SpecialistBlackmagic Design EMEA
Find the download location in the Black Magic Design Support Center. The direct link for Macs is here.