Thanks for the reply. With a little extra code from some other searches I was able to get exactly what I needed.
For anyone else with this need: here’s the code I put into a WP page (text panel) which reads the files in a directory and opens them upon selection from the list. To get multiple directories in one drop down, you can repeat the code between the [MMFileList] brackets with different directories.
<select id=”urlSelect” onchange=”window.location = jQuery(‘#urlSelect option:selected’).val();”>
<option value=”” disabled selected>Select your option</option>[MMFileList folder=”../../relative/directory/” format=”custom” types=”pdf,docx”]<option value=”{url}”>{name}</option>[/MMFileList]
</select>