We have this fixture in the database but haven't confirmed the current firmware version or a reliable source. If you have it, submit it below. It helps every crew that preps this fixture after you.
GotchaBeamlight Max90 is a passive optical reflector/modifier with no electronic components, it has no firmware. It attaches to G-Mount fixtures (MG1200Bi, MG2400Bi). Any firmware shown as 'Product Firmware' on its product page is a placeholder with no active download link.