Delete the rendered files and re-render your timeline.
I'm a complete amateur... If I delete the whole file will it not be lost?
At this time, are you working with the tryout of Premiere Elements or the purchased Premiere Elements?
I suspect that you still have the tryout and no purchased version is involved in this at this time. If I am correct, then please read on.
The instruction to delete the rendered files and re-create your timeline works only when you are in the purchased program.
You can remove the Adobe watermark from tryout project files after you purchase Premiere Elements and open the tryout files in it and do one of the following.
a. Go to Timeline Menu/Delete Rendered Files....the Adobe watermark is gone
b. Do nothing...some us have found that just opening the tryout project file in the purchased version automatically removes the Adobe watermark from
the tryout project file.
But, remember, you cannot remove the Adobe watermark from exports from the tryout, be it export to file saved to the computer hard drive or a burn to disc product. It is only the tryout project files from which you can remove an Adobe watermark.
We will be watching for your progress.
Any questions or need clarification, please do not hesitate to ask.