I am using Simplify3D on a Mac computer, and when I try to upload a file (one specific file) and prepare it to print, it locks on “Looking for overhangs”, until I manually quit the program. It begins to use roughly 300% CPU according to activity monitor, and can last in this state for at least several hours, until I manually quit out of the program. When I choose to quit the program, right-clicking it on the dock and choosing Quit, it seems to go through all of the steps leading to a completed file and then crashes, after which I used force quit to close it completely. The file is called Fin Supports Rybonator Dice Files.stl from this Dropbox.
https://www.dropbox.com/sh/ymqlmpzp6k8t ... -qSha?dl=0