Thanks for the files. It's a strange issue, because we cannot reproduce the crash here. Tested on two workstations, using RC 2.3.4 and Max 2015 SP3 (i guess that same conditions as you).
Regarding the minidump, it shows the crash in a Max function used to clean edges of editable polys. I think it's a Max bug caused by this specific geometry, but i'm afraid there is not much we can do, if we cannot reproduce the problem.