Just a couple bug fixes and the new Metallica amp.
Mark I/II:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/3.0/axefx2_Quantum_3p03.zip
XL:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/3.0/axefx2_xl_Quantum_3p03.zip
XL+:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/3.0/axefx2_xlplus_Quantum_3p03.zip
Mark I/II:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/3.0/axefx2_Quantum_3p03.zip
XL:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/3.0/axefx2_xl_Quantum_3p03.zip
XL+:
www.fractalaudio.com/downloads/firmware-presets/axe-fx-2/Quantum/3.0/axefx2_xlplus_Quantum_3p03.zip