The PDF-XChange products add watermarks (sometimes called "demo stamps") to documents when a licensed feature is used in evaluation mode. Please ensure that sensitive documents are saved before licensed features are used in evaluation mode as these watermarks cannot be removed.
When using the free version of the software some features will place watermarks on a document upon Saving/Exporting/Optimizing/Etc.
This will also happen using a regular Editor license if you try to use Enhanced OCR, create a Fillable Form, or create Dynamic Stamps, as these features are Editor Plus & PDF-XChange PRO exclusive features.
Another common cause of this is having the incorrect product package installed, or, simply not having your license key in place. Always ensure that you have run the correct installer and license key, both present on your account page, to prevent this issue.
A license must be purchased and applied to your software in order to resolve this issue. Our product pages are available here.
For instructions for adding a new product key see this article.
**Note: If you have not purchased a license or have not entered it, watermarks will be reapplied to the document every time they are removed until a valid license key is entered.**
Once you have Purchased a valid license:
The Document is now cleared of our Demo stamps. In the future, to avoid placing these, ensure that you are only using features which are covered by your license. If you need to purchase a license upgrade to use a new function, please do so from your account page.
You can contact us by phone, email or our social media accounts — we are here to assist you.