Pantheon Reverb missing from plug-ins

I recently had to get a new MacBookPro and I was able to update my e-licenser and also updated to the latest version of Cubase Essential 5 (5.1.1 I think).

I was doing some multi-track recording this weekend and when trying to use Inserts, the Pantheon Reverb plug in that used to be there is no longer. It is still listed in the list of plug ins but and I can select it but there is no interface that appears when I do select it or try to edit it.

Any suggestions?