Google App Engine: appcfg.py rollback

Question

I\'m using Windows 7 and for the life of me I cannot figure out how to call the rollback function on appcfg.py. All I want to know is what to type into the command prompt so

Answer 1

After experiencing quite a it of frustration trying to 'appcfg rollback' on my Mac, I read Jaky's answer and resolved the problem in a couple of minutes by changing the version number.

If you're using eclipse, just open the appengine-web.xml under war>WEB-INF in the project & change the version number there.