directory opus messed me up; i need to restore window explorer

i made a mistake of installing directory opus n made the option of having that as the default instead of ms window explorer; so after it locked me out , i managed to uninstall it but now everytime i start my computer, window explorer doesnt get launched, but instead other programs (paintshop pro, acdsee, etc...) does anyone know how to fix that ?
 
Right click on start button, click on explore, click on tools then options, go through each option clicking on retore default.
 
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