Help, Switch over from RB1100AHx2 to RB1100AHx4 not working

The problem is JUMP form 6.3.1 to 6.42.7

There is FORMIDABLE change in the ROS http://forum.mikrotik.com/t/v6-41-current/114978/1

Try to downgrade to 6.40.9 bugfix which is the last version which is compatibile with 6.3.x line