[Plugin: Nivo Slider for WordPress] Hide plugin access to users

How can i block users from viewing the NivoSlider plugin in the admin bar? I want only admin users to have access and to be able to make changes, but the NivoSlider plugin lets every user to make changes.

I found a plugin that lets me customize the admin menu access, but although i get NivoSlider blocked, it still appears in the menu to non admin users, and what i want is to hide it from them.

thanks.

https://www.ads-software.com/extend/plugins/nivo-slider-for-wordpress/