Hi there,
the latest firmware version is not 2023-10-31, but 2023-12-03. You will find the .hex file in the first asset anduril.2023-12-03.zip at the bottom of the page.
A diagram corresponding to this Anduril 2 release can be found here. This might help you to navigate the latest firmware version.
A lot of settings have changed in the latest firmware version compared to the firmware version that your light shipped with. Which version you prefer is up to you.
Interestingly, just recently, @jon_slider and me had a conversation about the firmware differences regarding the Emisar D2, which is also running emisar-2ch, model number 0135, so you might check our conversation from this post onwards.