Mark I/II:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/9.0/AxeFx2_Quantum_9p00.zip
XL:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/9.0/AxeFx2_XL_Quantum_9p00.zip
XL+:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/9.0/AxeFx2_XLplus_Quantum_9p00.zip
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/9.0/AxeFx2_Quantum_9p00.zip
XL:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/9.0/AxeFx2_XL_Quantum_9p00.zip
XL+:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/9.0/AxeFx2_XLplus_Quantum_9p00.zip