Hi.
Thank you for contacting us.
Sorry for the late response.
Yes, you can change the advanced search on the widget to 10 option by changing the code at file wp-content/themes/noo-jobmonster/widgets/widgets.php class Noo_Advanced_Job_Search_Widget line 1516.
On this class, it has some position need to change the po value from 8 to 10.
2. With the condition search field, as salary field. You can create a salary field with type is select, and the field value as
Under $1000
$1000 to $2000
$2000 to $3000...
Then you can search by this field value. That is the way some of our customers do it with salary field.
As you see, with the custom field, you can't a conditional logic as the static field. Because we don't know what is field value...
Thanks.