You only have one thing wrong and that is sending the stock tune and receiving the updated tune from GDE. You will need to save the stock tune to a folder on your windows computer and name it the way GDE shows in their instructions which is your order number followed by your first name followed by your last name then the extension and send it as an attachment by email to GDE. They will do their magic and email you the new tune back to you as an attachment with a new file name so you know it is the Hot Tune & Trans Tune, just copy that attachment to the same folder you copied the stock tune in and you then download it onto the scan tool, once it is on the scan tool you are ready to hook up to your truck. The scan tool will have the stock tune and the new modified tune on it so once you are hooked back up to the truck open the icon to tune and select the new tune from GDE. They will have different names, the stock tune on mine was the top of the list and the GDE tune was under it. There will only be the two tunes on the scan tool at this time.Your first have to install a bypass harness to allow the tool access to the ECU. Very simple. Included with purchase, I believe it is needed on 2018 models and newer. Then download your stock tune to the tool. Then connect with GDE and send it to them. A short time later they will send you the tune to download to the tool. Then you go back to the truck and install the tune. Complete instructions are on their website. The tool retains the stock tune if you ever want to put it back, and the new tune. They say eight minutes to re-install the stock tune. Sounds about right. The engine and trans tune are one tune together. Also reads codes. I will be keeping the tool in my truck should I have a roadside issue.