login needed

So I was using the plugin Theme My Login recommeded by the course plugin I was previously using. Today I tried to login and it gave me a fatal error, I disabled it via this dasboard, but now there's no login available. So how do I get the default one back. Also, when people registered for a membership sign in, they're taken to their profile page which doesn't have the top nativation. I want them to be taken to a page with the top navigation because that's where they launch from. How do I redirect to a page that shows that.