To check your firmware version, press the settings button in the top left corner of your MEATER Block touchpad. On MEATER Block, this is a gear icon, and on MEATER Pro XL, it's a list icon.
You'll see "Block Status" or "About" on the built-in screen. Select this by pressing the middle button on the touchpad, and you'll be able to see what firmware version your MEATER Block is currently on.