title: Mac kernel panic, now Android Studio project won't run
body: <p>I've been happily using Android Studio for months. Today for the first time when I hit "Clean Project" the Mac had a kernel panic, and after restart Android Studio was apparently corrupted. Got all kinds of messages about plugins being disabled. </p>
  
  <p>I reinstalled it but now the .gradle folder and all its subfolders in the Project view are shown in red, which I assume means trouble, and the green Run arrow at the top of the window is grayed out. How do I fix this? I've tried Rebuild Project but it didn't work. </p>
  
  <p>The Git server that hosts the project seems (hopefully) to be OK. </p>
  
  <p>[Update] The observed behavior was apparently due to the loss of Run Configurations in the crash. Re-creating a Default configuration enabled the app to run. </p>