Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
Emailed support twice. No reply. I cannot deregister my spark as I sold it. I deregistered it at the time However, the website tells me I cannot register two Spark units! Can you advise please?