Only the current version so far — new entries appear as the app ships updates.
MHENV_Plugin is a tools app by MHE Software with 1,000+ downloads (about 3.6K estimated). +1 installs in the last 7 days. Released Sep 30, 2012. Install growth, rank history, SDKs and ad networks.
From the store listing: “It is a function additional plug-ins for MHE Novel Viewer.”