I have already submitted an app (v1.0) now i wanna update my app. here, i got confusion. There in the windows developer center, two options are available.
Replace or Add New. Which one I should give to update my existing app ?
To update your app, you should use Replace.
Add new allows you to associate multiple XAPs with the same app GUID (for example, if you want to publish two different binaries for a single app: a WP7 version and a WP8 version).