hikaroute:
3 options:
1. Remove the hardware key, restart ArchiCAD in Demo mode, Save and Save As will be disabled.
2. Create a Work Environment that excludes Save and Save As.
3. Convert the file to TeamWork, allow access as a Viewer.
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
David