Attached is a screen-shot of RT 3.60, 3.64, 3.67, and 3.691, they all display 3 cores.
Also note that 3.64 displays version 3.67 instead of 3.64. Also, I am confused that 3.67 and 3.691 could be older that 3.64...
I included display directory listings of the downloaded zipfiles so you...