I am very new to tuning and have the new MVPI2 tool with 4 credits to use on a 2017 Chevy SS. I was able to down load and save the stock tune no problem, after that I got the latest firmware updates for the tool and re synced the interface then I tried to write a new tune to the ECM, I selected the file and it appeared to use 2 credits and when I tried to write the file it didn't seem to go anywhere. I discovered I forgot to turn on the ignition the first time and retried the flash with the ignition on and a popup said I didn't have the license to do it. I don't want to do something in error and burn more credits on another retry, my online account doesn't show the credits have been used yet so I must not have done something right. I am at a loss to figure out where where to go from here, can anyone help ? It would be greatly appreciated