Our customers have HPLC 1290 system: G4212A 1290DAD, G1316C 1290TCC, G4226A 1290Sampler, G4220A 1290 BinPump. The device was purchased in 2010-2011. Until now, users have worked with the ChemStation Revision B.04.03 program (16). Please advise whether customers need to upgrade software version (C) or upgrade via free firmwares? Please advise the version and explain what is the benefit?