Use the setup option in CALLMONITOR to make the changes.
Open CALLMONITOR.
Click on the "SETUP" button.
In the "general" section there is a "Reference List" entry,
click on the yellow folder to the right of it,
navigate to the new reference list location,
select the file,
click on "apply" to save your modification.
Close CALLMONITOR.
Open CALLMONITOR.
This CALLMONITOR will now use the new reference list as
reference code options.