Which crosswalk path need to set on window preferences

[pranalisnapwork]

Here I cannot get which crosswalk path I need to set on window preferences tab. As in usage section 3rd point it is mentioned to set the path of SDK and crosswalk. I am using Eclipse Juno is there any issue using that? I have set "crosswalk-11.40.277.7" location path. But when I am trying to export the crosswalk apk to the desired destination there file is not present nut the popup shows that "The crosswalk app has been exported successfully!"