Remove "Welcome to EasyRotator!" popup

I did the easyrotator setup manually and, although easyrotator was installed and is functioning perfectly I am being asked to install the easyrotator application in a popup that takes 1/3rd of my screen.

Can I disable this popup somehow? It is working fine, why do I need to uninstall and install an application on my computer to remove a popup on my website?

https://wordpress.org/plugins/easyrotator-for-wordpress/