Your Conduit was likely reset to factory default at some point clearing out the node red flow. You can download it again from here:
ftp://ftp.multitech.com/mmm/starterKIT_bluemixFLOW.txt
To import it use the “Import… From clipboard” option from the hamburger menu at the top right of the node-red page. Then copy and paste the contents of the .txt document. The nodes will appear under your cursor, click anywhere in the worksheet to drop them then click deploy.