Hi Sud,
Can you navigate to the following location to check if your applications are available in them:
C:\Users\<your username>\Analysis-workspace\com.sap.ip.bi.zen\repository
Each application that you create should be available under its own folder inside the repository. Also, cross check to see whether you have been creating applications on the local mode. You can check under Tools -> Preferences and check to see what is your startup mode.
Thanks and Regards,
Eshwar Prasanna