Remove Email Verification + Pie Register = Fail

I have a WP 3.5 install with Pie Register 1.2.91, which we use to customize the registration form by adding a few fields.

I installed Remove Email Verification 2.0 and it is not doing anything. I have disabled Pie Register custom email notifications to users. I assume there is a conflict between the two plug-ins.

What can I do to make this setup work?
Should I remove Pie Register? Do you have an alternative plug-in to customize my registration form with custom fields?