Just a quick question that I have is that my recently purchased calculator, the nspire CX CAS, has the 3.9 OS. Thus said, I discovered that ndless is not compatible with this operating system and there is no possible known way to downgrade due to its revision letter being greater than J, to be specific mine is M. So are there any emulators/ games that do not require ndless or is there no hope and I have to play the waiting game for ndless 3.9.

Hello all, I'm new here and just got the previosly mentioned calculator and I wanted to get my money's worth from it and install ndless to it. I was successfully able to find and download the 3.6 os and the appropriate ndless, yet I was blocked since any older os versions than 3.9 aren't allowed to be installed. I tried deleting the os from the calculator yet I still received the same error. Is there a way to completely wipe the calculator and install the 3.6 os or open up the 3.9 os code and delete the security blockades, since I did not expect that the only solution is to sit and wait whilst twiddle my thumbs whistling in the wind for a year till a new version of ndless comes out.