It (the login module) doesn't exist in WPS any more - I will look at including the registration plugin again, if it's not going to cause any problems, but the login was raising too many support issues that were really part of WordPress, not WPS, so it won't be included.
Have a search for other login plugins on wordpress.org and see if any meet your needs.
If I can include the registration plugin with WPS, it will be with the next release (v.39) as I'll look tonight. If it's there I'm ok to include it, if it's not, then I will have decided not to.