By default Print My Fax use internal system to print your faxes, in PDF or Tiff format. But for any reason you can prefer to use another program to print your faxes, like Adobe Acrobat reader or Foxit reader.

1. It is very simple to change this, click on 'Settings':

2. Click on 'Advanced Options'

Then unset the option 'To print PDF attachment...', now it will use the default Windows program associated with PDF file extension to print.