Did you hide the item, or did was it already hidden by default? In general, the free version of this plugin cannot unhide items that are hidden by default. It can only hide/restrict items.
yes I have the free version. I have a plugin called event espresso for managing events and I want to make it available to the editor role.
Unfortunately, the free version can’t do that. You’ll need either the Pro version or a different plugin. Depending on how Event Espresso implements its menu permissions, a role editing plugin like User Role Editor might also work.