A quick look shows me it is in the language files.
Languages/English/Generic.php
Key CHARSET
I have iso-8859-1 for version 7.5.6
If you have a backup from your older version you probably will find it is like utf-8

Of course if you have a different language pack installed you will need to edit the field in that folder


Blue Man Group
There is no such thing as stupid questions. Just stupid answers