Each license is bound to one MT5 account number. To move it (new broker, passed a challenge phase, new funded account):
1. Open Licenses in your client portal.
2. Enter the new MT5 account number and save.
3. Restart the EA on the new account — validation succeeds immediately.
The old account stops validating on its next check. There is no limit on how often you can rebind, but the license only ever validates on the currently bound account. If the field is empty, the first account the EA validates from will be bound automatically.