I'm sure your familiar with Solidworks, when you run the appropriate tools in SW it assists you in making fully parametric models from the scanned mesh, which can easily be cleaned and simplfied too. I did have to convert the STL to OBJ in meshlab first though, no other operation other than just changing the file type. Just another little annoyance I wish the EinScan-S software did itself.

I've been working professionally with Solidworks for the past 10 years so with the data modeling the objects afterward is a breeze. I wish the geomagic add-in for SW could be purchased without the "Capture" scanner, but alas, it cannot as far as I know.