We have decided to pull the 0.16.2 release until we can resolve the issue.
Windows users, please download and install 0.16.0. Fix you have issues with these build please let us know.
Mac users can stay on 0.16.2 or 0.16.1, which should be equivalent and neither should be impacted by this issue.
We will let you know when we have a fix.
PS. the issue amounts to an error attempting to spawn an external process we use to generate toolpaths from the loaded gerbers. This mechanism has been part of the application for years. Our theory is that a change to our build VM had some unexpected side-effects. We are still investigating.