It's probably because auto quality is running and it can't be manually adjusted like before. What I do when I open it is turn off Auto when 07/03/17 10:53 AM
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it reaches the quality I want it at. It starts from the lowest and goes to the highest. Give that a shot and see if it helps
If that still doesn't work for you look at the sticky up top and try B3V Viewer. I use both. Sometimes one works better than the other