Before I downloaded photoshop cc 2015.5 when I was in Lightroom I could hover the cursor over a preset and I would get a preview. Now I get nothing and have to check every preset in a very time consuming way.
I would suggest you to first update Lightroom to the most recent version of 2015.6.
Once done, restart Lightroom and you should be able to see the change of the image in the Navigator panel in Lightroom.
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