Have an activation issue

To whom it may concern:  i recently replicated my site to a staging site, and now the wpForo licenses for Advanced Attachments and Polls is no longer authenticating.  It's telling me: too many sites activated for the license key.

I cannot find any way to "manage sites" here, so I cannot deactivate my staging site.  I find this rather challenging that I cannot use the keys on a Staging site.

Can someone help please?