If you are talking about the settings under configuration, the install sql will probably not run completely. The only way to completely rid yourself of that is to go into the database itself.
Using phpmyadmin or similar interface, first, look at your configuration groups table and find the one for the feeder. Note the group id for it.
Then go to the configuration table. Do a search for that group id and then delete what shows up. You can also then delete that group id in the groups table.
Suggestion though: also do a search in the config table for a group id of 0. If you have results, check to see if any of those look like they are for the feeder. If so , delete them. If you have others, they also may need deleting. Having a group id of 0 means those settings don't show up in the admin and are usually from botched installs. I have had to do this for the google feeder install before.





