missing the rest of the share buttons

Hi, I just updated my hupso plugin and would like to add Stumble Upon to the share buttons, but I can no longer find Hupso under settings to do so. So far I just have the facebook and twitter buttons and had previosly ommitted the rest,so that I could add the share buttons as I added the social media accounts. Any help is appreciated, thank you!

https://www.ads-software.com/extend/plugins/hupso-share-buttons-for-twitter-facebook-google/