I just helped my friend set up their computer with Dolphin, and ran into a similar issue.
Try moving the Dolphin folder from "My Documents" to somewhere else (like the desktop), delete the Dolphin program folder, and download the latest dev build. This way it will be a totally fresh start, with no old files getting loaded. (I can't tell if you've already tried this from your original post)
Try moving the Dolphin folder from "My Documents" to somewhere else (like the desktop), delete the Dolphin program folder, and download the latest dev build. This way it will be a totally fresh start, with no old files getting loaded. (I can't tell if you've already tried this from your original post)