How do I REpost to facebook?

Ok so I forgot to change the text of the autopost before I published something and I can't see anyway to republish to facebook via the plugin.

Trouble is, when I try to do it without the plugin (just sharing the link on facebook) I can't seem to get the same featured image thumb. Only a logo for the site (which incidentally I have no idea where it's coming from because opengraph isn't enabled in WPMUdev UF). Hence why I need to do it from within the plugin itself.

Any ideas?

Thanks!