I deactivated my apps. When I check "Hide Inactive Apps" flag, my app appeared on "https://my.appcelerator.com/apps" page. But it's already deactivated. I guess the problem is I have two of same app name and Email GUID apps. I think it's a bug of Appcelerator web app.
To be honest, Appcelerator should provide us the function to remove apps.
