Theme Compatibility

I have a theme called citilights by nootheme.com with a “Go To Top Button” built in and/or plugin that came with the theme but I am not happy about the behavior.

If I were to install your plugin, will it override the current “Go To Top Button” or I would have to manually deactivate the plugin or remove the code it came with manually before I can use yours?

THANKS in advance for your kind attention!

https://wordpress.org/plugins/float-to-top-button/