Comment by pekka.klarck:Waseem, it looks like RIDE configuration file has been corrupted. You should try does removing it fix the problem. Here are more information about the configuration file, including where to find it:
http://code.google.com/p/robotframework-ride/wiki/Settings
Re-installing the core framework definitely shouldn't cause problems like this.
and if that doesn't work you can try reinstalling RIDE. For more information: http://code.google.com/p/robotframework/wiki/Installation
