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Please

1) Switch to 'Legacy GPU mode', to do so:

   - close FastRawViewer

   - Use  Windows Start Menu - All Programs - LibRaw - FastRawViewer - Use Legacy GPU mode  registry script to switch mode

2) Start FastRawViewer again and return back some advanced capabilities via Preferences - GPU processing:

   - GPU Engine - OpenGL or DirectX 11

   - Image resampling: Bicubic

   - Downsampling: Area

   - GPU Memory usage: Optimal

   - Process RAW data on GPU: Bayer or all