EDIT: Just figured out how to retrieve the Steam Key for the DLC and did so; i then went to Steam and registered the key successfully and Steam now shows it registered but lists status as "Not Installed" even though I did download the DLC executable from you and ran the installation.
SHAMEFACED CONFESSION: It occurred to me to simply re-launch Steam as that has worked in the past and, yes, it worked here too...when Steam came back online, Pandora had updated successfully and games runs fine so...nevermind! Perhaps my post will be helpful to others who, like me have not had enough coffee yet to wake up completely.
