How to customize social sharing buttons?

Hello, really like your plugin. I am having a small issue, trying to customize my Reddit button and it doesn’t seem to be working. I have enabled the social share button settings, and have tried uploading the button image via URL and through my media library, but nothing happens.

Thanks!

https://www.ads-software.com/plugins/wp-social-buttons/

Edit: I’m sorry, I got it. I had to edit the floating sidebar. Sorry to trouble you ??