So I have the new handheld. Received my custom tune from FSP. I followed all directions. I dragged the folders to my handheld and I brung it to my car. Every time I plug it into my car the Custom Tune option is not lit up for me to select it. I've done everything I can think of. I tried it on my mac ...

I just received my product. I've never done anything like this before. Do I just select tune vehicle and follow directions from their? And another stupid question is do I need to keep the Diablo plugged in when I'm done. Like when I'm driving the car after I tune it? You have any pointers for me ...