Can’t uncheck “Update when posts have been edited” anymore

The plugin is sending tweets each time I update a post. I went to the basic settings in order to deactivate this but there seems to be an issue with the basic settings of the plugin. When I uncheck “Update when posts have been edited” and save it the new setting won’t be saved. Instead, the hook reappars as soon as I save the new settings… Seems to be a bug.