Plugin will not delete | WordPress.org

Installed the plugin,did not do what I wanted so I deleted it, now even though I deleted it, it still when I send in a post with postie it sends the post in as a page, not a post, I deleted the plugin, cleared my cache several times, tried different browser, changed categories in the posts area and it still puts the posts inside of the pages, seems like when you delete it it changes something in the core files and does not undo it when deleted, created a real problem for me.

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