You're not suppose to open any file, just download the hex file and look for it when you upload it in the interface. It will give you some warnings about G5 board.. just ignore that warning and upload it anyways. It should be as simple as just updating it.
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JB4 S2 ISO Map7, BMS Intake, BMS Chargepipe, BMS Downpipe, BMS OCC, Flex fuel wires.
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