I tried downloading the plugin, but couldn't for some reason. I sincerely hope people can't simply extract the cat assets from that plugin and use them for free in their own projects, otherwise you're just giving my assets away for free, and that's very wrong. It's okay to use these assets in your project, even in commecial projects, but not if the project gives others access to the assets and enables them to use these assets in their own projects for free. Please tell me this is not the case.
Truth is, that any asset can be extracted from any game or project with the right tools, that's a compromise that game developers have to deal with. You can't show an image without giving access to the image.
My intention was never to give away your assets for free, nor have I explicitly allowed it to be.
I respect you and your work, I'd be willing to switch to another asset pack if you disapprove of my usage.