We just released a small update today that should hopefully address some of the random crashing some players have been seeing (along with a few other oddities). Along with this update comes one minor bug fix for the middle mouse button still being able to drag parts in the designer.
The game will now default to running in DirectX 9 rather than 11. Due to this change, we have disabled real-time plane reflections for now (sorry). For those that wish to continue running in DirectX11 (and get real-time reflections), you can use the "-force-d3d11" flag in the launch options to do so. Please let us know in the forums if you have any issues or if things are running better for you.
We also want to thank everyone for the feedback so far. We are taking a look at it all, prioritizing, and starting to address some of the major issues that have been identified. Stay tuned!
Thanks and enjoy!