The Terms of Use (http://labs.autodesk.com/utilities/photo_scene_editor/term_and_condition/) don't state anything about having to have a previously-purchased Autodesk product or it being non-commercial use only.

But the EULA (http://labs.autodesk.com/utilities/photo_scene_editor/eula_text/) does seem to have something about it being non-commercial:

"Tester may not use the Pre-Release Products for competitive analysis, or commercial, professional, or other for-profit purposes."