How to completely uninstall plugin

Hey guys,

Great plugin but I need more flexibility. I’m making a custom post type for documentation but when trying to register the post type I am getting an error that the permalink /docs is being used even though I’ve completely deleted weDocs? How do I completely remove weDocs so I can use that permalink structure. I’ve tried re-saving the permalink structure in WordPress but I am still getting the error.

Let me know what I should do to make that permalink available.

Thanks