In the Save Options property you can specify how PDF-XChange should save your documents.

It is not necessary to add an extension to the file name , PDF-XChange 4.0 will automatically add the correct .PDF file type, to the filename.

In the File Name field you can specify a default name or Macro to be used in naming the file. From a popup menu, you can select from a list of available macro's.

You can also combine and append Text and Macro's to achieve your desired formula for a file name.