Which steps did you take to "bring all the data over"?
VoiceAttack itself normally should run even without having been installed using an installer, as far as I'm aware.
Speech recognition training data needs to be transferred using
the tool listed here under "Back up your speech engine training file". However, keep in mind that such data is specific to a given microphone, environment, and audio path (E.G. filtering). Any differences between the old and new machines could affect accuracy (generally I'd recommend redoing the training if at all possible, remembering three times is the absolute minimum).
For information on transferring third-party HCS Voice Packs products between machines, you'll want to ask them directly via
their forum, or
their Discord