There was no crash report generated immediately after the AP crashes that I mentioned above...not even a dialog that read "AP has quit unexpectedly" which is what I have seen before when a program crashes. I have also checked for a crash report using the instructions Pauls listed above, using "console". There is no crash report there either.
However, in the three days since I made the adjustments noted in my above report and repeated below, AP has not crashed.
I turned off the switch in the export menu that tells AP to open the newly saved .pdf in Preview.
I increased the memory usage in preferences to nearly the max limit.