Thanks for the quick response Scook. I took a quick look over the Melodyne site and if I understand correctly the multitrack functions only come with the top end Studio version of Melodyne. That was the feature that really caught my attention but if it doesn’t come with Essentials 4 then sticking with Melodyne 3 Editor does seem the better bet. Thanks again for the help.

The multitrack feature is only available using Studio. All other versions are single track products. The upgrade to Studio is ~125$ through March from resellers.

As the Essential 2 to Essential 4 upgrade is free it isn't done in the shop but in your account on the Celemony website.

I just loaded up Melodyne singletrack and it opened the Page to download the update automatically.