SumoMe button?

Hi,

I’ve just seen that in the same bar where the others share buttons appear (Facebook, Twitter, G+), now there is a Sumome button that cannot be removed (at least that I can see).

Here is an example of what I mean: https://masdecibelios.es/mumford-sons-wilder-mind/

As you see, there is this Sumome button just on the right side of the share bar.

Here is the link to a screenshot I took to show it clearly: https://masdecibelios.es/wp-content/uploads/2015/05/screenshot-sumome.jpg

Do you know why it could be caused?

Thank you very much!

https://www.ads-software.com/plugins/wordpress-social-ring/