Trouble deploying to Google App Engine

 I am following this tutorial: https://confluence.jetbrains.com/display/PhpStorm/Getting+Started+with+PhpStorm+as+Google+App+Engine+PHP+IDE

Everything works fine until I get to step #7.  (I'm using Windows so the screenshots are different than in this document, so it's quite possible I've missed something.)

When I get to Tools > Google Apps Engine for PHP > Upload App Engine PHP App, I don't get a popup asking for my Google credentials.  Instead I get:

  File "C:/Users/Suzanne/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/appcfg.py", line 133, in <module>
    run_file(__file__, globals())
  File "C:/Users/Suzanne/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/appcfg.py", line 129, in run_file
    execfile(_PATHS.script_file(script_name), globals_)
NameError: name 'execfile' is not defined

...in the App Engine window.

What am I missing?

Thanks!