the way I used to keep multiple software updates versions in my tool was by renaming the folder to something else. example the current Chrysler software will just leave it as is so that it keeps updating and an older one will rename to chrysler2 or you can even rename it with the software version number, since it has a different name it will not get updated. first you need to have a back up or multiples ones even, then rename them and write either the released date or version number, just an idea.