The changes are permanent and once he's finished reprogramming it, you're free to unplug the dongle. I forwarded this post to him, and he can contribute to more in-depth questions, but basically, he's connecting to the app he sends to your phone (which is connected via BT to the dongle) via the web to a specialized app he has that sends the reprogramming commands through.
@18MaliPremier it's more of a reprogramming to include those menus than simply enabling ones already installed (as far as my knowledge goes, he may get into more detail about it).
I've also noticed that the boost gauge in particular is probably from another motor with the same DIC system, as the LTG 2.0T in the Malibu makes more than 12psi of boost, but I'm not sure if the gauge is reading the actual number or if it's just -12 is shown as the min and 12 as the actual max capability.
@Chong69 you'll have to ask him, it likely depends on the model and driver cluster version. Like I mentioned earlier he may try to join the forum and contribute here but a surefire way to reach him would be through the methods I put in my original post.
