Hi, I have a problem with ad-buttons plugin (http://wordpress.org/extend/plugins/ad-buttons/). It stopped working. Doesn’t appear on the page (should be in the sidebar) – http://www.pawelsuder.pl/referencje/. Doesn’t appear in the list of plugins. But options bbookmark is available in the dashboard. I deleted the folder manually from the server and 2 SQL tables but after adding back the plugin remembers my settings and the problem is still on. How can I permanently remove it to be able to upload again and fix it?
Every plugin is coded differently and works differently, it is impossible to say anything in general. Perhaps the plugin edited or added some files of your WP installation or theme? Remembering settings sounds like database information though. Are you sure you found all tables? Perhaps something is added to some more general table.