Unable to remove watermarks

I installed this plugin, and it watermarked my images with the watermark that comes with the plugin. I changed the watermark image, but it did not update any of my images.

Now, I can’t remove the watermarks from my images. I have tried unchecking the watermark functionality and even uninstalling the plugin.

No luck.

Any ideas?

https://www.ads-software.com/plugins/dynamic-watermark/