Originally Posted by
force10
I had the same recollection and did as you suggest. Unpairing and re-pairing went fine but the pop up never reappeared. I think there must be some separate way to disable the trainer part.
In case anybody else is ever trying to figure this out, the connection as an indoor trainer is separate from the other sensors like power/speed/cadence etc and unpairing is done in a different place. To unpair as a trainer, go to Menu-->Training-->Indoor Trainer and you can remove/add the trainer there.