I love your plugin. I'm using it at ScottPemberton.com on our custom post type of Events, so that the past events disappear from the "upcoming tour dates" widget in the sidebar.
however, I frequently need to deactivate all my plugins for the purpose of debugging some other issues. Evidently deactivating the plugin erases the data affiliated with the events. A bummer for sure. It also seems to reset which type of posts the plugin works on.
Can you update the plugin so that it retains this information even if deactivated? That would be great.