what to do?

hello all..

i hav got few RB 133/133c, i hav upgarded their ROS to 3.13
but they didnt perform upto the expectations, they trouble me like anything, they will gonna make me nuts. so i decided to downgarde..but all in vain.. mikrotik have deleted the older version of ROS.

now where to find them and why mikrotik removbe it frm there..?
help me plz.

thx…

Use 3.30 if you need. It works fine..