I upgraded to the latest releases -- V751_027_69 and V811_010_10 and bb logging works fine on 02 Silverado, pass-through logging works fine, but the tuning software won't connect. I'm getting the same error about the wrong firmware version that's posted in another thread. I saw in the other thread that a possible inverted number had been fixed, but I haven't seen the fix. Also, when I try to reflash, the software displays V2 AutoCal for the type of cable. When I link up with EFI Explorer, it correctly identifies the cable as a V2 FlashScan.