accidentally changed the url

OK, I was in the admin panel, and wanted to change the home page. I added “/home” to the home page url field. Unfortunately, I also added this to the main url. Now I get the following 500 error when trying to login: “The server encountered an internal error or misconfiguration and was unable to complete your request.”

I plan to download the site and reupload to a home folder so the new directory will be “www.myurl.com/home” Then I will edit the site url in the admin panel to “www.myurl.com”

In the meantime, is there a workaround for this?

thanks