This question was also answered above, applies to what OP was asking about (MODO) and AT5 which seems to be where the thread ended up:
Peter_IK wrote:There is not a set SKU in the system but if you feel you would like to upgrade, please contact IK Support and they will see what they can do as the forum users, moderators, nor admins can assist with this issue. Thank you.
Also, please review the forum rules about posting the same question/topic/etc multiple times. Your question is answered here, no need for another topic.