This problem is fixed in ClarisDraw 1.0v2.
With ClarisDraw 1.0v1, if you try to open a MacDraw Pro library as a regular document, when no document window is open in ClarisDraw, your machine will crash.
To reproduce:
1. Launch ClarisDraw.
2. Close the new document (if any).
3. Open any MacDraw Pro library via the open dialog (open it as if it were a regular document - not a library).
The library will open, and your machine will hang.