Ah thanks for the steps to reproduce! Haven't had this happen before since everyone seems to be using Escape to close the manual robot hacking window. Apparently you closed it by clicking on the 'X' button, and in this case that won't close the associated code help window at the same time!
I tested both and the Escape method works normally, so my guess is you probably tried the 'X' button first, and when that left the other two windows showing you tried Escape, which would then do nothing. (And of course after that it'll crash.) I've fixed it, though until the next update if you're in this situation use Escape instead.
Thanks!
