I had the same problem as Jeff. Purging cache (alone) did not help. What I did is:
1. Uninstalled the plugin (until the point where all DB items were reomved)
2. Purged all caches
3. Re-installed the plugin
1. Uninstalled the plugin (until the point where all DB items were reomved)
2. Purged all caches
3. Re-installed the plugin