what is this icon for?

Hi Paul,
I ran the tool to eliminate duplicates. I removed duplicates. But I still see this icon (see image).

What is that for and how can I get rid of it? (or do I need to get rid of that?)

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Secondly, I wish - after duplicates search - only duplicates are shown next to each other in preview panel.

drb

That is the duplicate icon.

That is the duplicate icon. You can go to "Edit | Toggle Mark" to remove it. In the next major release, we will try to improve the duplicate checking feature. Thanks, Paul