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 I can rollback my app.
Try this: appcfg.py rollback <directory>
If your application myapp resides in C:\Users\Nilesh\Documents\
then directory path should be C:\Users\Nilesh\Documents\myapp
If you installed Google App Engine Launcher in your system, then installation path should be something like this C:\Program Files\Google\google_appengine
Now open the command prompt and type the following:
C:\Program Files\Google\google_appengine>appcfg.py rollback C:\Users\Nilesh\Documents\myapp
This will solve your issue. :)