I am having the same problem with SSL. It started when I updated to v 2.2.2. I did not deactivate the plugin. I chose instead to revert to an earlier version.
I am offering the following observations to help shed light on the problem:
With v. 2.2.2, I was able to connect to the hidden login page via SSL. After logging in to an insecure admin page(I disregarded the encryption warning), I was only able to use http (non-ssl) in the admin area. If I tried to use SSL I would receive the error message ‘You must log in to access the admin area.’ I discovered this by replacing http with https in the admin area, e.g. https://www.mydomain.com/wp-admin/plugins.php.
To fix this problem, I deleted the Rename wp-login folder from my server and uploaded and activated v 2.2.1 from the list on your developer tab. This version did not work at all. It would not allow me to log in via SSL.
I deleted the v. 2.2.1 plugin folder from my server and tried v 2.2, which did not work either. Then, I uploaded and activated v 2.1.1. Now the plugin is working properly again.
This plugin has been invaluable in preventing brute force attacks on my blog so I intend to use v 2.1.1 until there is a fix for the SSL problem.