White Balance for Sony A7R arw files

Hi, I tried to process sony raw files shot with A7R. These import ok but show a wrong white balance. I converted the files using lightroom into DNG format. Then the white balance is ok. I also spotted a problem with loading the A7R raw files into faststone image viewer 4.9. the files are ok in the low zoom level, but kind of grey when switching to full resolution.
Any suggestions?
Any suggestions?