Keep the other fields as their default.
Then enter "utf-8" as showing in the 1st screenshot attached to this post. The case of your search string does not matter -- it's case-insensitive
2nd screenshot shows what should be in your results.
click on the "Edit" link next to "generic.php"
3rd screenshot shows in RED, the item you should revert back to what your previous character set was. Enter "ISO-8859-1" in this field. Then press the "Update Language File" button at the bottom (it doesnt matter which of the two buttons you click. they both do the same thing.)
