go through all the objects (views, searches, field extraction and so on) in your app and make sure they are not
private (see http://docs.splunk.com/Documentation/Splunk/6.3.0/Knowledge/Manageknowledgeobjectpermissions ). Next install this app https://splunkbase.splunk.com/app/2613/ which will export any App and its content, as long as it is NOT private. You will get a
spl file which can be installed on other Splunk instances without problem.
Hope this helps ...