UBB.threads PHP Forum Software Community Forums Resources and Customizing How Do I? Changing the Welcome Message Sender

I know it's on here somewhere, but I've been searching for 30mins to no avail.

How can I change the sender of our Welcome Message.I know how to change the message itself, but can't find the area to change the sender. This person is no longer an admin on our board and I completely forgot that she set it up with her username.

Thanks in advance!