You can delete the project to remove it, then create a new one to connect to from within your Concrete5 profile. You'll then need to reassign the appropriate add-ons to the new project.

Thanks, but that absolutely didn't help. I deleted a bunch of projects and there still is no place to add a new project. Now supposedly when you link from your site and the Concrete5 dashboard, when you click the connect to the community link it's supposed to reconnect your site. In stead I get a blank page, with connect to community at the top.

On the add ons page I get this message.

Your site is not connected to the concrete5 community.
The base URL of your site does not match a registered instance of the site. Please click below to authenticate your site again. I do, and not happens except I get a blank page with the head connect to community.

So, all of my licenses are associated w/ sites that no longer exist and I'm trying to reassign them to the new url. The question is how?

I better understand what your issue is now. Weyboat's answer should be sufficient!

I just run into the blank page the other day myself. I already use the "Handle HTTPS" package as is, so I simply set that page to use HTTP only and averted the issue in that way...