Using the public release, I've had two crashes thus far... but unfortunately the Crash Reporting Utility crashed as well during the process of sending the report.
I have forgotten what I did for the second crash... but I remember the first in detail. I used the 2000 van body, high-roof variant. I placed E36 headlights on it, and proceeded to click through the variants multiple times. The headlights then stopped contouring to the body and became unclickable. I went back to the paint tab and started morphing the front back and forth, seeing if that would solve the problem. It didn't change the contouring, but the headlights became clickable in the fixtures tab. When I clicked the red X to remove the headlight, the game crashed.
A small note; upon starting the game, I get a pop-up saying that there is a known incompatibility with the Nvidia driver I am using (340.52), and it recommends that I install version 375.70. I can not do that because the driver I am currently using, is the last that supports my 260GTX (216 core). I am able to click ok and the game loads fine though.
I'm not asking to change that or anything... just letting you guys know in case that information is of value to you.