The Adobe watermark appears in the project file of the tryout version of Premiere Elements, that you know.
1. You can remove the Adobe watermark from the tryout project file (prel) by opening that tryout project file in the purchased version.
and then either
a. Timeline Menu/Delete Rendered Files and then render the Timeline content (classical solution)
b. Often the Adobe watermark will disappear automatically (has happened for many of us)
2. You cannot remove the Adobe watermark from any exports of the tryout project file, be it export to file saved to the computer hard drive or a burn to disc product.
If you are interested in more information than that, my blog post on the matter may be of interest. Then, please refer to
Any questions or need clarification about the above, please do not hesitate to ask.
Sounds great! Thank you so much!!