The radio buttons are fine, but the question is confusing. In 1.1 it currently says:
Show or Hide Featured Image?
Yes No
It would be much better if it said:
Hide Featured Image?
Yes No
Also, on my site the plugin is not working for either the page or the global settings. Whether I choose Yes or No it always shows the featured image. I am on the most current version of WP and using the jkreativ them.