Notes about the RFR 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 RFR file type is primarily associated with 'Photoshop' by Adobe Systems Incorporated. Frame files contain scalable tiles and corners that you apply to any rectangular selection. A variety of companies offer such filters and they usually also work in Paint Shop Pro and Fireworkd graphic editors.