PDF-XChange 4 installs with MindMapper 16 Arena so that MindMapper file can convert to PDF. PDF-XChange 4 remains in trial mode until convert to PDF command is invoked, in which time, the PDF-XChange 4 turns to licensed mode.
You cannot directly print to PDF-XChange 4 from Print menu. If you do it will create a watermark on your PDF document.
You must use the Save/Send menu: File>Save/Send>PDF>PDF