Unfortunately I have activated the plugin on a live WP 3.8 only site. I haven't created any data with the plugin yet, however I already have pages on my site.
To test the effect I created a local copy of the plugin and simply removed the plugin from the folder. After that no more page could be opened although they are still in the backend. Even If I re-add the same activated plugin to the plugins directory I still cannot open my pages.
Bottom line: is there ANY way to remove the plugin without these effects?