I had to actually install an earlier version of Sonar to get at V-Vocal. I love how V-Vocal lets you switch over to the amplitude tab and manually tweek the gain envelope as you tune the vocal. It's one stop shopping and has a much nicer looking interface than melodyne. Plus it's not a thing where once you get it up and running, you realize you have a light version that only does one or two things ... but I digress.
I installed sonar X1 I think it was ... then after that, when you designate a section of an audio track as "Region FX", you should then see V-Vocal in the menu in Sonar X3 or whatever version is your go to.