Deleting an online Library

I want to delete an endnote online library account. In setting up the online library, syncing and sharing, I made multiple mistakes. The library isn’t syncing and sharing as it should. I’d like to sync and share a new library and delete the earlier one. I’ve searched for how to delete it, and can’t find any instructions. Can you tell me how to delete my online library account. 

The easiest to follow instructions I think, are those given by DCushman here; 

Sorry, gave the wrong answer and link – that was for something else.  

Here are the instructions to remove and resync a new library to the web. 

Thanks Leanne, I’m going to give this a go tonight and I’ll tell you if it works. Thanks for your help. Izzat