Welcome to the hobby.
Good news, the head unit is supposedly very easy to swap out =).
Bad news, if it was a cobb stage 1 flash, it is gone now unless the car has the accessport in it. In order to take the thing out, you need to revert the tune back to stock to "unmarry" it. You can only have the cobb on one car at a time basically. So the tune is probably gone unless it wasn't a cobb accessport flash.
If you post up some pictures of those adapters I'm sure you'll get some more help.