corona 5 in max 2017 is worse as in corona 4.
While in 4, max just crashed and you could save a _recover max file, now 3dsmax completely hangs, without the option to save.
A lot of artists, myself included, may rely heavy on the CTRL-V CTRL-C script, which uses a merge file method.
I'm sure that this is an easy fix, so please make this a priority.