FIX WP Thumbnail MOD

I am using a WP Thumbnail MOD for WP 3.1 - It is supposed allow you to upload thumbnails to your WP posts. It does not appear to work. When I attempt to upload a thumbnail, it is stuck in a endless cycle. I also can not find any of the options for the mod, resize thumbnails, how to delete thumbnails from posts, etc. Looking for someone to fix this for WP 3.1 hopefully this is just an easy fix. You can find everything you need here, including the download: [login to view URL] I need this mod to work as intended. I need to be able to find the options. I need to be able to remove thumbnails. Thanks for looking