Not seeing "Upgrade" as a menu option

After building two Ambikas and pressing the Golden release to two brand-new Sandisk 4GB SDHC cards, formatted FAT32, I don’t see the “upgrade” option available. Menu is blank in that spot. Is this normal?

The menu is visible only if there is a firmware upgrade file on the card. Is there such a file?

No, it’s just the Golden release files. I can’t find the sysex files for firmware updates—looked on GitHub, but somehow not finding. Any pointer to relevant locations is hugely appreciated.

Wait, do you want to do the update by MIDI (.syx file) or with the SD card (.bin) file?

Either is fine. Happy to use sysex via Sysex Librarian, or .bin via SD card.

All files are here