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Power Director 17 bought it a couple of years ago have key but still get a watermark.
I have applied all patches.
Maybe a dumb statement, but is it proper to assume that you removed the trial, installed the bought copy and entered the SN? The trial which you obviously had installed cannot be turned into a proper working version.
If you have proper version installed vs the trial, post a screen capture of your timeline, some versions had a feature in a Title timeline that needed to be deleted. Also post a pic of your installed release by clicking PowerDirector in the upper right-hand corner and then a screen capture.
Jeff