Uninstallation and complete deletion of this plugin does not restore the permalink to using the base /category/ either. hence, whenever i typed abc.com/category/uncat/.. it will still redirect to abc.com/uncat/ and that causes page not found, unless i put install back the plugin.

ive tried this with a clean WordPress and this issue is confirmed. have looked into .htaccess file and everywhere i can think of to remove the redirection but failed so far.

does anyone know how to manually fix this issue?