- Electron version: 0.37.7
- Operating system: MacOS 10.11.4

Create a directory with the attached `package.json` and `main.js` files. The app just calls `app.makeSingleInstance` (code sample copied from the Electron docs) and then creates an empty window.

[package.json.txt](https://github.com/electron/electron/files/233556/package.json.txt)
[main.js.txt](https://github.com/electron/electron/files/233558/main.js.txt)

Type:

```
    rm -rf ~/Library/Application\ Support/Electron
    npm start
```

The app will display

```
    ### version 0.37.7
    ### shouldQuit:  true
```

...even though no other instance is running.

If you create an empty ~/Library/Application\ Support/Electron directory, the app runs as expected.

(Obviously, any established Electron developer will have such a directory and will not notice this bug. Their users will notice it very quickly indeed.)

chromium_src/chrome/browser/process_singleton_win.cc
const ProcessSingleton::NotificationCallback& notification_callback,
    UINT message,
    WPARAM wparam,
    LPARAM lparam,
    LRESULT* result) {
  if (message != WM_COPYDATA)
    return false;
  
  const COPYDATASTRUCT* cds = reinterpret_cast<COPYDATASTRUCT*>(lparam);
  base::CommandLine::StringVector parsed_command_line;
  base::FilePath current_directory;
  if (!ParseCommandLine(cds, &parsed_command_line, &current_directory)) {
    *result = TRUE;
    return true;
  }
  *result = notification_callback.Run(parsed_command_line, current_directory) ?
      TRUE : FALSE;
  return true;
}
bool TerminateAppWithError() {