What are the limitations of the trial version for PDF programs?

The trial version and registered version are the same product. The only functional difference between the trial version and the registered version is that the trial version can only be used for 15 days and a company watermark will be added to the converted files.

After purchasing, you will get a registration code. Once you register the product, you can use it to convert your PDF file again, there wont be watermark in the new converted file.