Oh dear, I really do think I am missing something silly. BTW my PIM is set to auto scan.
Am I doing something wrong? I understood that if the VST3 is installed correctly, I should immediately be able to see Melodyne in Region FX. I keep looking for it in the PIM in VST3 instruments. I previously found a VST2 version of it but that doesn't help. To be honest, I was not even aware of it being found in Region FX as I always used an F8 shortcut. BTW VST3 64-bit is the only thing that I chose to install this time. Melodyne does open from my desktop shortcut.