The challenge/response hard disk authorization is only available in the older (32 bits only) Speakerphone 2.0.5.
You are free to use this one instead of the latest, the 2.0.5 installer is available from the downloads page.
We strongly discourage running this old Speakerphone 2. This version will not be updated anymore. We recommend to use the latest Speakerphone 2.1. This one does require the iLok (2nd generation or up) key yes. Whenever your ilok key breaks or you loose it, we will always help you (supply a new license for a replacement key).