Is there any upgrade for Insteon Thermo Plugin HS2?

[jverb]

Hi Everyone,

Is there an upgrade price for the new Insteon Themostat Plugin? Several years ago, I bought the one that works with HS2, and I just rebuilt my whole system on HS3; I'm curious if I can buy an upgrade, or if I need buy the full Insteon Themostat plugin for HS3.

Thank you.

John