Looking for the same. I download the plugin because one of its features were mass editing tool and I do not see any menu under tools in my wordpress dashboard.
Nobody, accept the coder himself, knows, why he takes off the mass edit tool, I guess. On his website he writes: “This plugin is no longer actively maintained” and it seems to stop at version 3.6.38. On the other hand he removes this very interesting part out of this very nice plugin.
The best way will be to download the last version with the mass edit tool inside. It ist 3.6.38. You can find it http://wordpress.org/extend/plugins/headspace2/developers/
I think I will take the mass editor to change backwards all my seo things. Than I export / import / change to an other plugin.
