Hello,
if you mean browser autocomplete, at the moment there isn't any built-in parameter to disable it.
You can try to modify this line in /views/form.php
$form .= "<input".$disabled_attribute." type=\"text\" name=\"".$field_name_temp."\"";
to
$form .= "<input".$disabled_attribute." autocomplete=\"off\" type=\"text\" name=\"".$field_name_temp."\"";
I haven't tested it so I can't guarantee but it should set autocomplete off for most of the field types (which is, maybe, not what you want but you could add some if statements related to the field type).
Best,