This Plugin has been Network Activated in a WordPress Multisite ("Network") installation. Since all of this plugin's Settings can be specified separately for each individual WordPress site, you will need to go to the Admin pages for each Site, and review the plugin's Settings page, making changes appropriate for that Site. The plugin's Settings page can be found by opening the Settings submenu on the left sidebar of each Admin page for the Site and selecting Private Site. Or from the Settings link in the plugin's entry on the Installed Plugins page for the Site (WordPress does not list Network Activated plugins on each Site's Installed Plugins page, but this plugin has added its own entry for your convenience).
Alternatively, you can Network Deactivate this plugin and Activate it individually on each Site where you wish to use it.
If you would prefer, when this plugin is Network Activated, to have a single set of Settings that would apply to all Sites in a WordPress network, and/or be able to view and change all of the Settings for all Sites from this one Network Settings page that you are now viewing, please contact the Plugin author and this will be added to a future version of this plugin if there is enough interest expressed by webmasters such as you.