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?)
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