Steve,
If you import catalog from tape, go to Restore:
down-left side , select tab Tasks, select Restore Internal Database , at the right side select server ,on server name right click and select properties, on backup version show you the version available, search the most recent , go to Destination , select at new destination and do restore.
after restore , stop services and replace file on original location.
start services and now you recover your IDB
Regards.