[Plugin: Registered Users Only] locked myself out

I just created a word-press blog that I wanted to set as private, so i searched for a widget and installed registered users only plug-in. before I created any registered users, I was inadvertently signed out of word-press and now have locked myself out. How can I register myself or get back into the blog I was creating?
thanks!
rachel

http://wordpress.org/extend/plugins/registered-users-only/