This is not an answer, as I have the same problem.
I am trying to use the plugin on a multisite.
If the plugin is activated on the Network plugins page – it does not appear in individual site plugin pages.
Deactivating it on the Network plugins page allows it to be activated on the individual site plugin page, but it still does not become available on the menu.
Given that you posted your query August 2013, and probably still do not have a response, I am wondering if the plugin is still being supported.