Screen flickering when running testcomplete 10.10.7

Just installed the TestComplete Desktop version (10.10.7) , when I run the testcases (JScript) , the screen flickers alot...it is difficult to watch

I was using Version 11 ( trial version ) and ran same test cases , and it didn't flicker at all. What can be possibly different between

these two version that causes the screen to flash so frequently?

Is there any settings in TestComplete I need to adjust , or turn off for version 10.10.7?

I tried to get screen shot...its not possible to capture that moment flickering happens

thanks