That mrate problem was caused for the following reason:
The program redirects to the robots folder if it can not find the robot in its current folder. The mrates data (on save) should redirect as well. However it was redirecting to a .txt file instead of a .mrate file (ding V8)
Also, I think I was a able to stabilize point mutations a little more to prevent overflows by reducing how much max time (in cycles) the program is allowed to make between point mutations.
Anyway, check out announcements post of version B to find version C.
Have fun. I am going to take the advice and take the rest of the day off.