Rated 3 out of 5 stars

I'm rather upset. You really do not get what I mean? You show me three options: left click to display messages, right click show info, double click change flag, right?; The first option did not do thing it supposed to do... I clicked on duplicate emails (one and only one left click), I looked around but no messages (the content of email) displayed ...I wonder if this is a bug or there is no option for seeing it inside message pane

This review is for a previous version of the add-on (0.1.10). 

Now I know what you mean. It looks like this feature does not work anymore. Unfortunately, I do not see an error message in Thunderbirds Error Console. So this makes it hard to debug. I try to find a solution. Thanks for the bug report.

Quite good Rated 4 out of 5 stars

I know about that. Right click Folder and click duplicate messages...; A window appeared and showed me all duplicate things, I followed the instruction, and click on duplicate list (left click) for message to display, but nothing happened ?? I use thunderbird 3.1.15

This review is for a previous version of the add-on (0.1.10). 

Did you click or double click the messages? Actually the state of an E-Mail should toggle between "KEEP" to "DEL" when you double click them.

Rated 4 out of 5 stars

It'd rather good add-on; however, I cannot see duplicated emails by using left click

This review is for a previous version of the add-on (0.1.10). 

You need to do a right click on a folder. There you can select 'Remove Duplicate Messages ...'