Can't reinstall LASTfm plugin

I couldn’t get scrobbling working so I tried to uninstall and reinstall the plugin and it wouldn’t uninstall via the gui, failed with an error, now it won’t install again I get this message:

Downloading plugin at http://plugins.volumio.org/plugins/volumio/armhf/miscellanea/lastfm/lastfm.zip
END DOWNLOAD: http://plugins.volumio.org/plugins/volumio/armhf/miscellanea/lastfm/lastfm.zip
Creating install location
Unpacking plugin
An error occurred while installing the plugin Error: Plugin lastfm already exists

I searched the entire install with find and grep and cannot find last.fm plugin stuff at all, I deleted anything I could find hoping it’d allow me to reinstall it, it did not. any ideas?