yeah, Sami's really good about backwards compatibility. The current version, 3.63, supports characters from 3.50 (March 2018), and if you forget to move an even older character over, then you could find an older version of the game and open the character in that, then save it. So you could open a 3.40 character in 3.50 and then save it and then open it in 3.63. Easy.