Email changing issue

[donnyheller]

This is obviously supposed to be possible to change the email address in the account settings: https://forum.bearchive.co/usercp.php?action=email
But that doesn't work.
The only "success" I could get is a mention of some "further instructions" that should be sent by email.
I've checked that with a few email providers, checked spam folders as well, no instructions are delivered.