Removing an educational watermark from a Vectorworks file is a restricted process because educational versions are legally intended only for non-commercial, learning purposes. If you use elements from an educational file in a professional version, the watermark typically "infects" the professional file to prevent the commercial use of student licenses. Official Removal Methods
There is a lot of contradictory advice online. Let’s clarify what does transfer the watermark under normal circumstances, provided you are using only commercial licenses for both creation and export: remove vectorworks educational watermark