WPMU Ultimate Branding - Welcome Dashboard widget only shows for admin roles?

Hi, I using the Ultimate Branding plugin and the Remove Widgets Dashboard feature that also allows a custom Welcome widget.

I wanted to use this for displaying some user instructions for the client. However it only seems to appear on the Dashboard for the admin user role, not Editor (or presumably anything lower).

It's not hidden in the 'Screen Options' drawer at the top either.

Any ideas?

Thanks,
Ben