You can view the key details about a package installed from the Salesforce AppExchange.
In Salesforce, you could click on your name in the top right corner and access the setup. The app setup shows all the Installed Packages. You could open the Silverpop CRMi and view the version number. If you do not have access and cannot see any of the sections listed above, you may contact your Salesforce administrator to get your package version.