Where is this VST3 file located for the 64-bit? I see the Melodyne.VST3 file in the directory: ProgramFiles/Common Files/VST3/Celemony/Melodyne
 
When I pull up the VST list, I see the non 32-bit referenced plugin, but the built default plugin list does not show it. It shows the 32-bit plugin instead. Evidently if the plugin manmager finds a plugin, it ignores any subsequent reference when building the default plugin list.
 
I have reset the plugins and did a rescan with no difference. It looks like there may be a melodyne file somewhere in the 32-bit path??

I uninstalled and reinstalled the plugins. All is good now. I had updated to the full editor after installing. Don't know why that would matter, but all is better now. thx all..