New Card Old Version Software

I have had detrimental problems ever since the 8000 series radios came into existence with the Smart SDR software that included those radios. Prior to that I had zero issues everything was great. Is there any way to get an older version of the SDR on a New SD Card so it can be like it was in the past and not with the constant radio crashing issues I have been having. It is getting to the point I will sell all Flex items and go elsewhere. Having a radio that crashes everyday is like not even having a radio at all. Perhaps a brand new SD card with 3.8.19 and a new SD card with the current version on it. Would try the new card with new software first, perhaps the card is going bad with the million updates over the last years. If not possible I guess will sell my entire flex setup, 6600, tuner and amp and go with a different brand.