update function not working

[VineethaVi]

If the user has a previous version of the app installed ,the update/cancel message appears on the app, but Update doesn't update and message reappears after it is closed. The App needs to be deleted and re-installed for an update.

[VineethaVi]

Using previous version of vachanGo app. shows the update/cancel message. clicked the update , came out from the app.