We recently switched to a new combined login page with the public release of our new pre-release version. If you haven't had a chance to check it out the new version I really recommend it. There are a ton of new features and changes that really improve the system. The new combined login page looks like this:

Type your email and password for the original and click the PayWhirl Classic version. 

Need to reset your password for the classic/original version, click here.

Manual link to classic/original version.