I would uninstall Vu eand Pro from the "old" machine and clean the registry+reg file. Then I would copy the full Vue 4 folder from your drive on the powerfull machine to your empty drive (the one with 19 G) and make it run once to make sure it is ok. Then I would install the sidegrade over this copy (if you have the sidegrade and not the full version). Restart machine and make run Vue Pro once. It should then ask you if you want to update. Say ok and let it do. This worked for me.