That depends on what you're referring to, specifically.
You can copy over the entire profile database file, "VoiceAttack.dat", normally located under "C:\Users\<your username>\AppData\Roaming\VoiceAttack", which will include any VoiceAttack profiles you had created or imported.
However, this does not contain any third-party plugins or additional files. If you're using third-party addons (E.G. from HCS Voice Packs), you'll want to ask the author about their migration procedure.
HCS Voice Packs can be contacted via
their forum, or
their DiscordIf you're referring instead to your trained speech recognition profile, you could try the tool linked in the "Back up your speech engine training file" section of the
TIPS & HOW-TO page