I am very new to the nspire, as I bought it off craigslist to replace my Ti-84. I heard great stories of the mods and programs you can add, so I updated to 3.1, and was going to install ndless. The problem is, now that I updated to 3.1, my touchpad doesn't work, there is no cursor, my buttons have random inputs (The calculator thinks 8 is A, 2 is B, T is 2, N is 5, and so on.) It has no functionality now pretty much, as I can barely even navigate the menus. I really don't want to update to 3.2, so if there is a way to fix this or downgrade, please help! And thank you so much for reading this!