[Plugin: Universal Post Manager] Bug: Saving Manager–>PDF Save Options

I installed this plugin. The default is the button for the PDF. I rather want to use the icon. So I go to Saving Manager and change under PDF Save Options from button to icon. Now I need to update. Here is the problem. I am not able to update. Nothing happens if I click on update. Is anybody there to assist how to fix this problem.

http://wordpress.org/extend/plugins/universal-post-manager/