Start from scratch in the commercial license using the edu example for reference only.
It should only take a few minutes and will be a good indicator if you learned anything from the help that was posted here, or if you need to ask for additional assistance.
If you don't care about keeping a feature tree, you can export the file out as a parasolid and bring back into SolidWorks as a dumb model.
I just decided to re-draw the part.
Contacted my SW re-seller about it, they said that the Student Watermark removal is only done by Solidworks themselves and I had to fill out a Watermark Removal Form. I figured that I should just re-do the part that takes 4 horus of my time vs. the week that I might have to wait just to get the watermark removed.
I had a similar file that was drawn in a educational version. Now that we have a full license, I found that I couldn't make the hat go away. Today, I thought I'd try save as, saving it to another location and with a different file name seemed to remove the watermark and 'cap'. I've closed an re-opened Solidworks and still no watermark or cap.