FastRawViewer & Affinity Photo

Hi
   I have recently downloaded FastRawViewer and have been slowly finding my way around the interface, however when I attempted to make Affinity Photo the desired default location for my images for post processing I discovered that Affinity Photo appears not to be recognised by this software.
       I would welcome any comments from Affinity Photo users who have managed to make their version the default programme after culling their raw files.
My version of Affinity Photo is Version 2. I am running Windows 11. I look forward to any comments, thanks.