Can't login on local server

I’ve created a WordPress site on a local server using BitNami. I tried unsuccessfully to upload the site to a web server today. While doing this, I changed the name of my site and I think it’s conflicting with another (unused) WordPress blog I had set up. Now, I can’t login to either one. When I try to log in to the local server, the password just goes blank after I type it in. I’ve since uninstalled WP from the web server. How do I regain access to the site on my local server?