I wanted to share some more information about the changes from the Alpha and Beta developer kits that we shipped with the first Kickstarter campaign. I should start by saying that all Blinks are compatible for software and communication. The Blinks are identical in their components and communication and you can upgrade all of your developer Blinks to use the latest updates to the Blinks library.
What @BGA means to communicate is that using original developer Blinks mixed in with the production Blinks is not a compatible experience for play because the magnets are in a different alignment. To allow games to transmit from an original developer Blink to a production Blink, the developer Blink needs to be held down to the table to line up correctly for transmission. This means that you can still use your original Blinks for developing games and transmit games to your production Blinks. Additionally, the developer tool included can be modified to allow you to program any of your production Blinks as well. While we had to make some adjustments to the magnets to make for a great experience with the production Blinks, this does not prohibit the dev blinks or dev tools from allowing you to make or transmit games to each other.
Hope that provides a bit more clarity, happy to help out.
all my best,