After digging a little deeper, I discovered that after Greg filed a problem report, Bug #9565 fix for "VocAlign VST3 plugin failing to load" was issued in an update. This apparently addressed the issue of VocAlign not loading, but apparently did not bring it to full functionality, being that stopping the Mixcraft transport does not actually stop VocAlign so that it can work properly.
I'm going to continue to be the squeaky wheel on this, being that I'm now a devout Mixcraft user, and it is SO CLOSE to working properly. I sent a tech support email, and am hoping to hear back soon! If VocAlign works correctly in Mixcraft, it would be great to see it listed as a "working DAW" on the SynchroArts website.