I'd like to request you review your licensing model here, a single machine license is extremely limiting for any sort of power user. There are other measures you can use to flag abuse of keys.
I have been on the beta test, but I have 2 development machines and a laptop that I use. I bought a license, but I do switch between development machines and it doesn't seem right to buy 3 licenses for this.
I understand your concerns. On one hand we want to be user-friendly, on the other hand we need to maintain good protection against piracy. Another requirement is that the tool needs to work in offline mode due to secured networks. This means we cannot base it on online authentication schemes.
But I do agree that a single machine restriction can be too limiting. We will revise our licensing model and will take your suggestions into consideration.