Thanks for your message.
We intentionally disabled bulk editing for the user email.
The reason for that is that WordPress does not allow users with the same email. When using the wp_update_user method that is used by our editing feature for user email, does not allow a non-unique username. I guess you changed the user emails in your example in the database.

It is a bug that you can still enable bulk editing in our settings page for columns where Bulk Editing should be disabled. So that is something that we will change in the next release.

Unfortunately, there is no way for you to use our plugin to bulk-edit the user-email.