Yes, you have MyGenius correct, but I don’t know if it stores more than one tune at a time - it might, I’ll have to read the instructions :-o I’ve only used it once to download my OEM tune and archive it on my laptop. I haven’t tried to download my new tune yet. OETuning also archives my tunes in case I need them. Their Chief Engineer Jeremy is in Australia and good about replying to their common email.
The new and old tunes can be sent via email and loaded on MyGenius. They needed my engine CPU to build an updated model for retuning so they paid for FedEx both ways and did a quick/same day turn around - excellent service. BTW the engine CPU on the 2018 Sprinter 3500 is VERY easy to remove if necessary.
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