......that's what the dinosaurs said. Then the meteor hit.......
Why do you want to stick to the older version and not just do the current up date?
Dave hit the nail right on the head. I have to update to at least this version to add new VIN licenses, but I know some functionality was said to have been removed with the later versions. I hadn't saved any newer versions since 2017 because efilive said they would never require us to ever update our software for any reasons and the 2017 version I was using had everything in it that I needed. Then I learned after the fact that they changed there policy and forced us to update to at least these versions to populate an authentication code for a new vin license. I'm probably going to change my Tahoe from a P01 to a P59 so I can add E85 support and keep electric fans. With the P01 controller you can have 1 or the other, but not both. And I will have to buy a new license to do so, and I hope these versions retain all of the features my current older versions have(not like I use the emissions delete features, but I don't want to lose them just in case). I still have a spare V2 saved running on the firmware of my 2017 version and the software triple saved for it that I can use for reading tune files, modifying them, and then could load in to the newer version to flash in with my V2, but it's a lot less work to just keep a version with everything still in it.There are some things that got removed from newer versions, especially around emissions. In theory there are ways to work around that, but sometimes it's easier to just not update than try and find a workaround.
At least that is my reason for stockpiling all the old versions
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