The lack of information about this setting is amazing.
"By default you must approve every single user for a certain time under Users -> Edit and on the user settings page at the bottom."
If you click on the link to "Users -> Edit," you are taken to the WordPress All Users page.... okay, now what. If you go into a user profile there isn't anything that even hints at having anything to do with time.
"user settings page at the bottom."
What user settings "page?" There is no user settings page at the bottom.
Okay, just check the box "Do not use time based approvement," and everythins else about this plugin works fine, but how do the time approvment settings work and what is their useful purpose to make that the default setting?
It's almost like it was put there as a challenge, stating that if you just activate the plugin you may not be able to access your own blog, then telling you to read the descriptions carefully, and then coyly leaving you to figure out why you've been locked out of your own blog.
Oh, did I mention that this is a great plugin? ;-)