I am trying to help someone with a tune and they had it in a CTZ file. I was unable to open it, and saw the new update. I reluctantly decided to update v7.5, v8, and my flashscan. Now I have a V2 paperweight, and cant open any CTZ file. Every time I try a CTZ file, I get a box that pops up saying "EFILive V8 Scan and Tune Application has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify if a solution is available." Can I downgrade? If it makes any difference, I am using Windows 7 home premium.