I Use 3DS Max 2015, its kind of strange , because I have lots of models inside that max file and I export by selecting a model than exporting selection. If exporting all the models in 1 FBX file than I don’t get a crash. (sometimes)
(as a recap the models have been able to import in every version of Unreal 4 that ive had up till now. i haven’t changed a thing, some of them go as far back as when i used UDK for my project. I even tried to export from Max 2017 BTW from completely new scenes.