We fixed this a while back. Are you positive you have version 2.0.1
If you had and older version installed maybe if you completely deleted it and reinstall it might fix.
Even delete the rssdoodle_ tables if you are comfortable with Mysql.
Then again, maybe with wp 3.03 the issue issue came back for some people.
If you continue to have problems contact me direct via lessnau.com contact form and we’ll upgrade the plugin if that is what it takes.