Well, I think you’re keeping a troll behavior, continuing on this steps.
Anyway:
6.48.6
http://forum.mikrotik.com/t/v6-48-6-long-term-is-released/153888/1
6.49.6
http://forum.mikrotik.com/t/v6-49-6-stable-is-released/157307/1
7.2.1
http://forum.mikrotik.com/t/v7-2-1-stable-is-released/157240/1