Heys, ill make this short and sweet. someone i know has a c6 ls7 and im trying to rid the rear o2s but theyre all grayed out. i took the training online and had access to it and now its grayed out once again. i tried doing the course again but nothing. Anyone have an older VCM Editor that theyre willing to email me? the software itself not a link to it or a how to. I cant downgrade my software as recently i had to delete it and reinstall it so it has no history behind it. any help would be very appreciated thank you all