Ok so im new here and glad to have found this site to give me some much needed info!! Thanks!!

So i have a 96 T/A Ws6 LT1 and i have Jet DST program that i know very little about and i was just going to turn off a few switches and everything was working as it was supposed to then all the sudden about half way through a pop up says "THE PROGRAM HAS STOPPED WORKING" I have no idea why but now i can communicate with the ecm but it wont let me program it and its stuck in la la land somewhere and car wont crank or anything. Can anyone help me out and tell me what to do ????

Thanks