Hi there. Very useful plugin.
Still, I think I found a bug.
When registering a new account using the admin's email, it is initially accepted.
The problem is that it does NOT allow any further changes to be made for that user.
It brings out an error: "This email belongs to another member. Please use a different one".
It does allow changes though to the original admin account.
Please have a look. Thank you.
Come to think about it, this could probably be a good thing for security reasons... You decide