In order to get rid of the MOVAVI watermark across your video, you'll have to acquire a license on our website and activate the program with your activation key.
Then you can launch the application, open your project file via the menu File - Open project and click Export.
Then, export the video again.
It would not contain any watermarks.
Please note that it is impossible to get rid of the watermark from the existing video, but if you have a *.MEPX (or *.MEPB, *.MEPS, or *.MEP)project file, you can re-save it after activating the program and then your video will be saved without a watermark.