When did Atomic Blocks remove the "AB" prefix from their block names?

I have been using the Button block for months now only to discover that I'm actually using the Atomic Blocks button block!

I am so upset. I can no longer find the standard GB button block. Did Atomic Blocks remove or replace the standard GB Button block with their AB-Button block?

Who gave Atomic Blocks authority to name their button block "Button" which is suppose to be the name for the GB Button block?

What am I missing here?