

1-) Follow the path.. "Computer"->"C"->"Users"->"...Your User Name Here..."
2-) Click "Organize" menu and select "Folder and search options"
3-) "Folder Options" window should be opened now.. Click "View" tab and from "Advanced settings" select "Show hidden folders, files, and drives" and click "Apply" button then "OK" button..
4-) "AppData" file now should be visible.. Follow the path.. "AppData"->"Roaming"
5-) There is a file named "Mana" delete it..
6-) Uninstall the game..
7-) Install the game..
Your settings should returned to default now.. Enjoy the game..