I notified the vendor that the menu switch was flaky on my K1. They said they cannot replace it, but they gave me a full refund and I can keep it. That was very nice of them. I see that they have more units available for $35.
I am tempted to buy a $35 unit, but I really only need it for occasional code testing, so the one I have may be enough... Now I need to find a good price on a K2.