The PDF-XChange Editor Free, Evaluation/Demo version is free for both private and commercial use, provided it is not bundled with other software for financial gain.
When the PDF-XChange Editor is used in evaluation mode, many menu items are marked with a 
symbol, which indicates that they are licensed features. These features can still be used, but watermarks will be present on output content, as detailed below.
Please note that it is not possible to remove evaluation watermarks without a user license. If you want to experiment with the licensed features then we strongly recommend creating a copy of documents with which to experiment rather than using the original document itself.
If you want to use a licensed version of PDF-XChange Editor to remove watermarks, then click the Organize tab, click Watermarks and then click Remove All.