Yes you get Melodyne essentials, i activated mine last night and on the Sphere scheme.
It's tied in with the Studio One 5 software, so what you need to do is go to the menus at the top of the screen in Studio One and pick 'Studio One Installation' and in there should be a 'claim product key' by the side of Melodyne and a copy button to copy that key.
You simply paste that key into the melodyne website that popsup for authorisation, and you need to create an account with them. The key provides two machine activations for Melodyne.
As PreSonus servers are struggling at the moment, you may not receive the key at this point in time. But it will work once servers are back online, if you don't have success.