No I am using the VST2 version (I think) thing is even if not using Melodyne, the Region FX still does not appear (nor is the drop down box in Track pane available either).
And that's even with a fresh reboot of Sonar using the Normal template....same even after a PC shutdown as well. Seems like something is broken??? Believe it or not I have never used Region FX before...but thought I would try it (and Melodyne) for the first time this morning.