To uninstall a license for Nuance PDF Converter Professional, you can follow these steps:
1. Launch the Nuance PDF Converter Professional program.
2. Go to the "Help" menu and select "Deactivate." This will deactivate the license on the crashed computer.
3. Install the program on a new computer and activate your license by following the provided instructions.
Please note that these instructions may vary depending on the specific version of the software you have.