Stair-step print Problem, of Large objects, using Makerbot-3.7

[EagleSeven]

I installed Makerbot version-2.4 (the Old version) on a W-7 computer,
to see if it has same Stair-step problem, and it Does.
So I've determined that it's Not just the new 3.7 version that has the problem,
but All Makerbot software will not print large objects correctly on this CTC printer !

( an object 80 x 100mm wide is 5 layers Higher on one side)

So, looks like I'm going to have to Live with the problem for now,
because I'm not going to change the Firmware just to Test for a possible solution.