Hi Mike, with all the bot nets out there attacking wordpress sites, this plugin really needs a counter reset button. The This month, This year, all time stats, can get thrown off by one bot net attack. e.g. 227 hits at 1:20 am... and there is no easy way to clear it and start again.
Deactivating and reactivating the plugin involves reinstalling The Maxmind GeoLiteCity database, and of course you lose all the data. Just resetting the counters would be a big help.