Re: Upgrade to Leopard...
Phew! Glad you did try moving the components from the folder before I suggested a massive re-install!
I thought you'd already moved all the plug-ins out of the ... well never mind! I'm very glad it's ok...
But, (I feel like a school teacher wagging his finger now) please, please, please backup your system regularly to an ext. Firewire drive & especially when upgrading software!
Use an app like Carbon Copy Cloner to clone your system:
and Time Machine (in Leopard) to backup your files to a separate drive.
See if you can get more info on the latest version of Melodyne on the Celemony website.
Anyway, have a good one mate and enjoy Leopard ;-)