How to remove the copyright of the juxtapose js service?

Question

PHP

There is such a service https://juxtapose.knightlab.com/
Very good and simple, thanks to its authors. There you can compare two images very beautifully and place it on your website.
But the copyright, which inevitably hangs on the site, is very annoying. It would fit at least a little more in design, but no.
Essence of the question: Any thoughts on how to remove it?

Answer 1

.jx-knightlab {
  display: none;
}

Answer 2

Is it this little inscription in the lower right corner?
Ahem ... maybe it 's easier or is it than to appropriate someone else's work?
(if not an option at all, then the solution was written by @Stalker_RED)