Issue with accented characters in SQLiteStudio
&gt; SELECT hex(CompanyName) FROM Customers WHERE CustomerID = 'BOLID';
42F36C69646F20436F6D696461732070726570617261646173


This is not valid UTF-8.

That database was not created correctly.

If you know what the characters are supposed to be, you could manually fix them:

UPDATE Customers SET CompanyName = replace(CompanyName, x'F3', 'ó');


(You'd have to repeat this for all columns and all wrong characters.)