DigitalVolcano Software Support

I use Duplicate Cleaner 3.0, I have a lot of folders duplicated, so I started a scan on my computer (all hdd).

At the end of the scan, in the Duplicate Folders section, I can see "Nothing scanned yet".

However, in the Duplicate File section, I see all files duplicated in the folders duplicated.

Is there something to do to activate the search of Duplicate Folders ? I don't find any options.

Thank you in advance for your answer.

It should show the duplicate folder list automatically. Is the refresh button on this tab greyed out?
Are any other buttons greyed out, such as 'File Removal'?
I'm working on the theory that it has hit an error at the end of the scan and not completed properly.