Notes about the RPTDESIGN file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The RPTDESIGN file type is primarily associated with 'BIRT' by Actuate Corporation. A set of Java applications and APIs that support the design and deployment of a business report. These applications include Actuate BIRT Report Designer, Actuate BIRT Report Designer Professional, and a report viewer Web application servlet. The Java APIs provide programmatic access to these applications' functionality.