To Exit App Builder

Choose Exit from the File menu of the App Builder primary window to quit App Builder.

If you have not saved all changes, a message dialog box will be displayed, giving you the opportunity to discard the changes and continue the exit process or to cancel the exit process and continue running App Builder. Click Discard Changes if you do not want to save them. Click Cancel if you do not want to discard your changes; you could then save your changes and exit.