Replacing old social media bar to Floating Social


This is a question relating to my switching to Floating Social. I have deactivated the old one I used (Social Toolbar) by Daddys Design. However, it has left script behind it appears. Could you help me get rid of this leftover script and how to do it? Also, how to prevent this in the future if possible?

I need to fix it because it shows errors right on front end user display in some browsers like Firefox etc. Just need it gone asap.

I have left a question here but have not gotten a answer yet:

Thanks a bunch!!!