There have been multiple versions of the SIX-G generator, with each hardware revision the firmware version has also changed. Attached are the 3 versions, see below to verify what version of the PC Software you want to use.
4k Generators.
Generation 1 - Firmware starts with 1.xx (latest release is Ver1.89)
Generation 2 - Firmware starts with 2.xx (latest release is Ver2.64)
Generation 3 - Firmware starts with 3.xx (latest release is Ver3.07)
PC Software for these three versions "MURIDEO SIX-G2 V2.01"
8k generators.
Generation 4 - Firmware starts with 4.xx (latest release is Ver4.04)
PC Software for this version "MURIDEO 6G6A-8K V1.08"
Generation 5 - Firmware starts with 5.xx (latest release is Ver5.10)
PC Software for this version "MU-GEN2-SIX-G&A-8K V5.06"