[Plugin: SimpleMap Store Locator] not working after latest update

great plugin when it was working before the update. Now if you put in an American zip code the map displays somewhere either in Italy or Saudi Arabia…a canadian zip code still keeps me in canada but will not display my locations…..we have checked our settings and possible conflicts…but at a loss. Any ideas would be greatly appreciated.

http://ww.wp.xz.cn/extend/plugins/simplemap/