After you have the path, to go directly to the file, go to Start and choose Run ...
In the Run window right click and select Paste to copy the Preferences path
Please press OK button to open the Preferences folder
In Opera folder please find and select operaprefs.ini file. Right click on it and select Delete.
Please Confirm File Delete
To finish please close Opera folder and restart Opera browser
This method shows you how to restore Opera to default settings
In order to reset Opera to default settings you need to delete operaprefs.ini from your profile directory Please perform the following steps: Please open Opera, go to Menu button and select About Opera from Help
In About Opera go to Preferences section, select the path without the file operaprefs.ini, right click on it and select Copy