Getting a "Locked" file? That means your reseller locked the export feature. You need to ask them to unlock the STL export parameter in the Dongle settings.

🦷 The Truth About "3Shape Download STL" – It’s Not a File Button

If you’ve ever Googled you probably hit a wall. Unlike a basic slicer for FDM printers, 3Shape (Dental System/Trios) doesn't just hand you an STL with one click.