I inherited the maintenance of a site (asspl.com.au) and Custom Post Type UI was installed and running very successfully. I think it's a great tool, particularly for making the wordpress backend much more user friendly for folks who aren't comfortable with updating their own sites.
I digress...I have just added a new CPT, associates. You can see it temporarily here:
For some reason, even though I have featured image checked as an option under Advanced Options/Supports, featured image doesn't come up as an option in my side bar when I create new associates.
Am I missing something?