How can I find out what the latest firmware is for SiB? I am looking for something like a historical changelog like I can find in a lot of github releases.

I just received my SiB buttons, and the one I am working with is on firmware version 1029.40. I thought I'd do an update of the firmware in case there was a newer firmware version.

When I executed the UPDATE command, it actually installed an earlier firmware version, 1008.40. 

Is this expected? It was a little surprising.
(I was able to get "back" to the "newer" firmware with a command UPDATE 1029)